diff --git a/docs/release-control/v6/internal/subsystems/alerts.md b/docs/release-control/v6/internal/subsystems/alerts.md
index d441026bb5..0a133cf8fe 100644
--- a/docs/release-control/v6/internal/subsystems/alerts.md
+++ b/docs/release-control/v6/internal/subsystems/alerts.md
@@ -2901,6 +2901,30 @@ severity and the triggered-in-24h total; threshold override counts are
 configuration and do not appear on the overview. None of this changes alert
 lifecycle, acknowledgement, snooze, or delivery evaluation.
 
+### Thresholds lead with each group's default limits
+
+The Thresholds page answers "what will alert me, and at what limits" before
+any group is opened. Every collapsed threshold group whose table edits global
+defaults states them in its header through
+`getAlertThresholdsDefaultsSummary` in
+`frontend-modern/src/utils/alertThresholdsSectionPresentation.ts`. The helper
+reads the same column list and defaults object the group's resource table
+edits (each section hoists its columns into one module constant), and drops
+every metric `isAlertResourceMetricOff` reports, so the header can never show
+a limit the engine is not evaluating. Rules whose zero means a fallback rather
+than Off are stated as whole rules with their effective values: Docker's
+restart loop (count within its window) and memory-limit warn/critical, which
+`NormalizeDockerDefaults` always resolves to positive values. Backup age is
+summarized by its warning and critical days only, because fresh and stale
+hours colour the dashboard and never alert. A group switched off as a whole
+shows its Disabled badge and no defaults line. The CPU averaging line counts
+every configured profile override, including ones only the API sets. CPU averaging is tuning, not the page's
+answer. It is one collapsed disclosure stating the effective window and the
+number of platform overrides, with the same per-profile selects inside. Docker
+and Machines list their resource groups before Docker-only rules and the
+SMART card. Threshold values, inheritance, metric evaluation windows and
+persistence are unchanged.
+
 ### External watchdog is Pulse-availability evidence, not notification delivery
 
 The Alerts destinations surface owns the operator contract for an external
diff --git a/docs/release-control/v6/internal/subsystems/frontend-primitives.md b/docs/release-control/v6/internal/subsystems/frontend-primitives.md
index ef1326e310..a8113e0120 100644
--- a/docs/release-control/v6/internal/subsystems/frontend-primitives.md
+++ b/docs/release-control/v6/internal/subsystems/frontend-primitives.md
@@ -8357,3 +8357,11 @@ regressions preserve their original missing-value and fallback obligations.
 drawer with synthetic APIs in Chromium/WebKit desktop and 390/320-pixel light
 and dark views. This is presentation acceptance, not native backup/QGA safety,
 provider outage attribution, installed recovery or release availability.
+
+### Threshold group headers carry a defaults line
+
+`CollapsibleSection` takes an optional `defaultsSummary` rendered under the
+title as a muted line (`data-thresholds-defaults-summary`) that wraps only
+between items on phones and truncates from `sm` up, and is hidden while
+`isGloballyDisabled` is set, where it would promise alerts that cannot fire. Callers pass the shared summary helper's output rather than
+composing per-section strings.
diff --git a/frontend-modern/browser-verification/368f58089b70d7bf.json b/frontend-modern/browser-verification/368f58089b70d7bf.json
new file mode 100644
index 0000000000..064551caa0
--- /dev/null
+++ b/frontend-modern/browser-verification/368f58089b70d7bf.json
@@ -0,0 +1,81 @@
+{
+  "version": 1,
+  "base_sha": "1d4c3aeb6e529af3b63992ef22152e6b8b8a33d8",
+  "verified_at": "2026-10-05T01:34:30Z",
+  "result": "passed",
+  "changed_paths": [
+    "frontend-modern/src/components/Alerts/Thresholds/sections/CollapsibleSection.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableAgentDisksSection.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableAgentsResourcesSection.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableAgentsTab.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableDockerContainersSection.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableDockerTab.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableKubernetesTab.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxBackupsSection.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxGuestDisksSection.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxGuestsSection.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxNodesSection.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxPBSSection.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxPMGSection.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxSnapshotsSection.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxStorageSection.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableTrueNASTab.tsx",
+    "frontend-modern/src/components/Alerts/ThresholdsTableVMwareTab.tsx",
+    "frontend-modern/src/features/alerts/tabs/ThresholdsTab.tsx",
+    "frontend-modern/src/utils/alertThresholdsSectionPresentation.ts"
+  ],
+  "content_sha256": {
+    "frontend-modern/src/components/Alerts/Thresholds/sections/CollapsibleSection.tsx": "0a993dded673dbd2eb0b3919af2586a0fe4579ce10465e495710f526cf7ca1bd",
+    "frontend-modern/src/components/Alerts/ThresholdsTableAgentDisksSection.tsx": "d54ba2278c35ca5748cc0a310bb738dd9128454b1283d547bed7938568f92221",
+    "frontend-modern/src/components/Alerts/ThresholdsTableAgentsResourcesSection.tsx": "3b5cb92fb9b684d5655c6453b7e2738fb776d4c91bd566c319cc6d135301e095",
+    "frontend-modern/src/components/Alerts/ThresholdsTableAgentsTab.tsx": "463bba443bc9dfc52e9cfcb83505640d5f8e91f5c731a8ec8cab1542f43e81a4",
+    "frontend-modern/src/components/Alerts/ThresholdsTableDockerContainersSection.tsx": "3ee73f2b61ed5da9532dce15637e9803c4465f7a70241edf16e1692439c55fa5",
+    "frontend-modern/src/components/Alerts/ThresholdsTableDockerTab.tsx": "6226defd1e8adba0d28bae0998abd832993fc1e6b5b63f80024798c92684ecbd",
+    "frontend-modern/src/components/Alerts/ThresholdsTableKubernetesTab.tsx": "7e793356d6488169f8307ada64db35d9c15c9eacf1bddd30144e193f53345051",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxBackupsSection.tsx": "8b89d2d4e3ffcbfe1dceb6d4a5d309c1d424d1d58059110e51b9e73a93fcd670",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxGuestDisksSection.tsx": "7849b5ed2d8c2674915aa98bcbd4bf348881efc155f00dbcbe9febeabcc38458",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxGuestsSection.tsx": "6f1694090e0022d1fff0653b06d1cf136f5fcebd59c88c41a4f703125d555ec2",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxNodesSection.tsx": "c48d40917928e0ca8564d4eb90cb0e6987c8c9313494a444fa98209a3eee5dc1",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxPBSSection.tsx": "d6801951e3d0ec6eaa7b267ff68e0f13ba3838be9c697b58822b94c57d719f06",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxPMGSection.tsx": "2606881fdc7a68b747c34793330756b41513c89f07cbebcc5a3f69c6039d6610",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxSnapshotsSection.tsx": "3a1bfafe2b44c724a5b351d37d721bf5992db31d66e761a0b782ad6f0a57cc7c",
+    "frontend-modern/src/components/Alerts/ThresholdsTableProxmoxStorageSection.tsx": "c4da879c91150d4c8d32c2068a4a0988ac3934f9d7297bff45d63b2ee1f4f6e2",
+    "frontend-modern/src/components/Alerts/ThresholdsTableTrueNASTab.tsx": "2d78009148e366e1546d52127ea1b0d0ee372037ca9b627a0ff3605854a1ca53",
+    "frontend-modern/src/components/Alerts/ThresholdsTableVMwareTab.tsx": "a628c3a17f16cb3ba74ca15bf53c0f8afa6d10390386b5b42f932c60105e167e",
+    "frontend-modern/src/features/alerts/tabs/ThresholdsTab.tsx": "ea46c8920f008f1904fe6e51dbfc4c5fa755e5af92341fe223fe75428efdf077",
+    "frontend-modern/src/utils/alertThresholdsSectionPresentation.ts": "75c2c8d6e0728b0ecec30b02c92185af63a32f03c43cede6a7068cba29943112"
+  },
+  "routes": [
+    "/alerts/thresholds/proxmox",
+    "/alerts/thresholds/docker",
+    "/alerts/thresholds/kubernetes",
+    "/alerts/thresholds/truenas",
+    "/alerts/thresholds/vmware",
+    "/alerts/thresholds/systems"
+  ],
+  "viewports": [
+    {
+      "width": 1440,
+      "height": 900
+    },
+    {
+      "width": 390,
+      "height": 844
+    }
+  ],
+  "states": [
+    "Proxmox tab: every collapsed group states its default limits (Virtualization Hosts CPU 80% \u00b7 Memory 85% \u00b7 Disk 90% \u00b7 Temp 80\u00b0C, VMs & Containers, Guest Filesystems, Storage Devices, PBS Servers, Mail Gateway with +12 more)",
+    "Recovery and Snapshot Age groups disabled: Disabled badge and no defaults line",
+    "CPU averaging collapsed to one line: 5-minute average for every resource",
+    "Docker tab: Container Runtimes and Containers lead (Restart loop 3 in 5 min \u00b7 Memory limit 90% warn, 95% critical), Docker-only rules follow",
+    "Kubernetes, TrueNAS, vSphere tabs: every group with defaults states them",
+    "Machines tab: Machines and Machine Disks lead with defaults, SMART alert rules card follows",
+    "Phone 390: defaults lines and CPU averaging summary wrap between items without breaking a value",
+    "No console errors"
+  ],
+  "interactions": [
+    "Opened CPU averaging disclosure: ten profile selects shown",
+    "Changed Virtual machines CPU averaging to 15-minute: summary updated to 1 platform override and the unsaved-changes banner appeared (not saved)",
+    "Expanded VMs & Containers to compare header defaults with the Global Defaults row"
+  ]
+}
diff --git a/frontend-modern/src/components/Alerts/Thresholds/sections/CollapsibleSection.tsx b/frontend-modern/src/components/Alerts/Thresholds/sections/CollapsibleSection.tsx
index d57c44a562..3723f82490 100644
--- a/frontend-modern/src/components/Alerts/Thresholds/sections/CollapsibleSection.tsx
+++ b/frontend-modern/src/components/Alerts/Thresholds/sections/CollapsibleSection.tsx
@@ -5,7 +5,7 @@
  * Used to organize resource groups in the thresholds page.
  */
 
-import { Component, Show, createSignal, createEffect, JSX } from 'solid-js';
+import { Component, For, Show, createSignal, createEffect, JSX } from 'solid-js';
 import ChevronRight from 'lucide-solid/icons/chevron-right';
 import ChevronDown from 'lucide-solid/icons/chevron-down';
 import { StatusDot } from '@/components/shared/StatusDot';
@@ -34,6 +34,12 @@ export interface CollapsibleSectionProps {
   icon?: JSX.Element;
   /** Subtitle or description */
   subtitle?: string;
+  /**
+   * What the group alerts on by default, shown under the title so the page
+   * answers "what will alert me" before the group is opened. Hidden while the
+   * group is disabled, where it would promise alerts that cannot fire.
+   */
+  defaultsSummary?: string;
   /** Message to show when section is empty */
   emptyMessage?: string;
   /** Whether to show a visual indicator for global disable state */
@@ -133,6 +139,23 @@ export const CollapsibleSection: Component<CollapsibleSectionProps> = (props) =>
               <Show when={props.subtitle}>
                 <span class="block truncate text-sm font-normal text-muted">{props.subtitle}</span>
               </Show>
+              <Show when={!props.isGloballyDisabled && props.defaultsSummary}>
+                <span
+                  class="block text-xs font-normal tabular-nums text-muted sm:truncate sm:text-sm"
+                  title={props.defaultsSummary}
+                  data-thresholds-defaults-summary
+                >
+                  {/* Break between items only, never inside "Disk 90%". */}
+                  <For each={props.defaultsSummary?.split(' · ') ?? []}>
+                    {(item, index) => (
+                      <>
+                        {index() > 0 ? ' · ' : ''}
+                        <span class="whitespace-nowrap">{item}</span>
+                      </>
+                    )}
+                  </For>
+                </span>
+              </Show>
             </span>
           </button>
         </h3>
diff --git a/frontend-modern/src/components/Alerts/Thresholds/sections/__tests__/CollapsibleSection.test.tsx b/frontend-modern/src/components/Alerts/Thresholds/sections/__tests__/CollapsibleSection.test.tsx
index 40f9cab7fa..710f053f07 100644
--- a/frontend-modern/src/components/Alerts/Thresholds/sections/__tests__/CollapsibleSection.test.tsx
+++ b/frontend-modern/src/components/Alerts/Thresholds/sections/__tests__/CollapsibleSection.test.tsx
@@ -26,6 +26,29 @@ describe('CollapsibleSection', () => {
     expect(screen.getByText('Child content')).toBeInTheDocument();
   });
 
+  it('states the default limits in the collapsed header, except while disabled', () => {
+    const [disabled, setDisabled] = createSignal(false);
+    const { container } = render(() => (
+      <CollapsibleSection
+        id="guests"
+        title="VMs & Containers"
+        collapsed
+        defaultsSummary="Defaults: CPU 80% · Memory 85% · Disk 90%"
+        isGloballyDisabled={disabled()}
+      >
+        <p>Rows</p>
+      </CollapsibleSection>
+    ));
+
+    const summary = () => container.querySelector('[data-thresholds-defaults-summary]');
+    expect(summary()?.textContent).toBe('Defaults: CPU 80% · Memory 85% · Disk 90%');
+    expect(summary()?.closest('button')?.getAttribute('aria-expanded')).toBe('false');
+
+    setDisabled(true);
+    expect(summary()).toBeNull();
+    expect(screen.getByText(ALERT_THRESHOLDS_SECTION_DISABLED_LABEL)).toBeInTheDocument();
+  });
+
   it('uses default data-testid from id prop', () => {
     const { container } = render(() => (
       <CollapsibleSection id="vms" title="VMs">
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableAgentDisksSection.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableAgentDisksSection.tsx
index 80eef07708..f737de1003 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableAgentDisksSection.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableAgentDisksSection.tsx
@@ -5,6 +5,9 @@ import { ResourceTable } from './ResourceTable';
 import { CollapsibleSection } from './Thresholds/sections/CollapsibleSection';
 import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
+
+const AGENT_DISK_THRESHOLD_COLUMNS = ['Disk %'];
 
 export function ThresholdsTableAgentDisksSection(props: ThresholdsTableSectionProps) {
   const { state, tableProps } = props;
@@ -14,6 +17,9 @@ export function ThresholdsTableAgentDisksSection(props: ThresholdsTableSectionPr
       <CollapsibleSection
         id="agentDisks"
         title={state.sectionTitles.agentDisks}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(AGENT_DISK_THRESHOLD_COLUMNS, {
+          disk: tableProps.agentDefaults.disk,
+        })}
         resourceCount={state.agentDisksWithOverrides().length}
         collapsed={state.isCollapsed('agentDisks')}
         onToggle={() => state.toggleSection('agentDisks')}
@@ -27,7 +33,7 @@ export function ThresholdsTableAgentDisksSection(props: ThresholdsTableSectionPr
             onConfigureResourceIntent={tableProps.onConfigureResourceIntent}
             groupedResources={state.agentDisksGroupedByAgent()}
             groupHeaderMeta={state.agentGroupHeaderMeta()}
-            columns={['Disk %']}
+            columns={AGENT_DISK_THRESHOLD_COLUMNS}
             activeAlerts={tableProps.activeAlerts}
             emptyMessage={state.AGENT_DISKS_FILTER_EMPTY_STATE}
             onEdit={state.startEditing}
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableAgentsResourcesSection.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableAgentsResourcesSection.tsx
index b4d77dbf87..5429e1e806 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableAgentsResourcesSection.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableAgentsResourcesSection.tsx
@@ -6,6 +6,9 @@ import { ResourceTable } from './ResourceTable';
 import { CollapsibleSection } from './Thresholds/sections/CollapsibleSection';
 import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
+
+const AGENT_THRESHOLD_COLUMNS = ['CPU %', 'Memory %', 'Disk %', 'Disk Temp °C'];
 
 const DISK_TEMP_TYPE_FIELDS: readonly { key: string; label: string }[] = [
   { key: 'nvme', label: 'NVMe' },
@@ -21,6 +24,10 @@ export function ThresholdsTableAgentsResourcesSection(props: ThresholdsTableSect
       <CollapsibleSection
         id="agents"
         title={state.sectionTitles.agents}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(
+          AGENT_THRESHOLD_COLUMNS,
+          tableProps.agentDefaults,
+        )}
         resourceCount={state.agentsWithOverrides().length}
         collapsed={state.isCollapsed('agents')}
         onToggle={() => state.toggleSection('agents')}
@@ -33,7 +40,7 @@ export function ThresholdsTableAgentsResourcesSection(props: ThresholdsTableSect
             title=""
             onConfigureResourceIntent={tableProps.onConfigureResourceIntent}
             resources={state.agentsWithOverrides()}
-            columns={['CPU %', 'Memory %', 'Disk %', 'Disk Temp °C']}
+            columns={AGENT_THRESHOLD_COLUMNS}
             activeAlerts={tableProps.activeAlerts}
             emptyMessage={state.AGENT_THRESHOLDS_FILTER_EMPTY_STATE}
             onEdit={state.startEditing}
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableAgentsTab.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableAgentsTab.tsx
index 55eb3c0167..b860b18953 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableAgentsTab.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableAgentsTab.tsx
@@ -6,9 +6,10 @@ import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/t
 export function ThresholdsTableAgentsTab(props: ThresholdsTableSectionProps) {
   return (
     <>
-      <ThresholdsTableSMARTDefaultsCard {...props} />
+      {/* The groups and their default limits lead; disk health rules follow. */}
       <ThresholdsTableAgentsResourcesSection {...props} />
       <ThresholdsTableAgentDisksSection {...props} />
+      <ThresholdsTableSMARTDefaultsCard {...props} />
     </>
   );
 }
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableDockerContainersSection.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableDockerContainersSection.tsx
index 5078cf0441..a96305a6d5 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableDockerContainersSection.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableDockerContainersSection.tsx
@@ -5,15 +5,46 @@ import { ResourceTable } from './ResourceTable';
 import { CollapsibleSection } from './Thresholds/sections/CollapsibleSection';
 import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
+import {
+  getAlertThresholdsDefaultsSummary,
+  getDockerContainerRuleSummaryItems,
+} from '@/utils/alertThresholdsSectionPresentation';
+
+const DOCKER_CONTAINER_THRESHOLD_COLUMNS = [
+  'CPU %',
+  'Memory %',
+  'Disk %',
+  'Restart Count',
+  'Restart Window (s)',
+  'Memory Warn %',
+  'Memory Critical %',
+];
+
+// Restart and memory-limit columns are summarized as whole rules instead.
+const DOCKER_CONTAINER_METRIC_SUMMARY_COLUMNS = ['CPU %', 'Memory %', 'Disk %'];
 
 export function ThresholdsTableDockerContainersSection(props: ThresholdsTableSectionProps) {
   const { state, tableProps } = props;
+  const containerDefaults = () => ({
+    cpu: tableProps.dockerDefaults.cpu,
+    memory: tableProps.dockerDefaults.memory,
+    disk: tableProps.dockerDefaults.disk,
+    restartCount: tableProps.dockerDefaults.restartCount,
+    restartWindow: tableProps.dockerDefaults.restartWindow,
+    memoryWarnPct: tableProps.dockerDefaults.memoryWarnPct,
+    memoryCriticalPct: tableProps.dockerDefaults.memoryCriticalPct,
+  });
 
   return (
     <Show when={state.hasSection('dockerContainers')}>
       <CollapsibleSection
         id="dockerContainers"
         title={state.sectionTitles.dockerContainers}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(
+          DOCKER_CONTAINER_METRIC_SUMMARY_COLUMNS,
+          containerDefaults(),
+          { ruleItems: getDockerContainerRuleSummaryItems(containerDefaults()) },
+        )}
         resourceCount={state.dockerContainersFlat().length}
         collapsed={state.isCollapsed('dockerContainers')}
         onToggle={() => state.toggleSection('dockerContainers')}
@@ -27,15 +58,7 @@ export function ThresholdsTableDockerContainersSection(props: ThresholdsTableSec
             onConfigureResourceIntent={tableProps.onConfigureResourceIntent}
             groupedResources={state.dockerContainersGroupedByHost()}
             groupHeaderMeta={state.dockerHostGroupMeta()}
-            columns={[
-              'CPU %',
-              'Memory %',
-              'Disk %',
-              'Restart Count',
-              'Restart Window (s)',
-              'Memory Warn %',
-              'Memory Critical %',
-            ]}
+            columns={DOCKER_CONTAINER_THRESHOLD_COLUMNS}
             activeAlerts={tableProps.activeAlerts}
             emptyMessage={state.CONTAINERS_FILTER_EMPTY_STATE}
             onEdit={state.startEditing}
@@ -54,15 +77,7 @@ export function ThresholdsTableDockerContainersSection(props: ThresholdsTableSec
             }
             formatMetricValue={formatMetricValue}
             hasActiveAlert={state.hasActiveAlert}
-            globalDefaults={{
-              cpu: tableProps.dockerDefaults.cpu,
-              memory: tableProps.dockerDefaults.memory,
-              disk: tableProps.dockerDefaults.disk,
-              restartCount: tableProps.dockerDefaults.restartCount,
-              restartWindow: tableProps.dockerDefaults.restartWindow,
-              memoryWarnPct: tableProps.dockerDefaults.memoryWarnPct,
-              memoryCriticalPct: tableProps.dockerDefaults.memoryCriticalPct,
-            }}
+            globalDefaults={containerDefaults()}
             setGlobalDefaults={(value) => {
               const current = {
                 cpu: tableProps.dockerDefaults.cpu,
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableDockerTab.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableDockerTab.tsx
index 9bd6aad526..60ba345a55 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableDockerTab.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableDockerTab.tsx
@@ -10,13 +10,14 @@ import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/t
 export function ThresholdsTableDockerTab(props: ThresholdsTableSectionProps) {
   return (
     <>
+      {/* The groups and their default limits lead; Docker-only rules follow. */}
+      <ThresholdsTableDockerHostsSection {...props} />
+      <ThresholdsTableDockerContainersSection {...props} />
       <Show when={props.state.hasDockerSpecificControls()}>
         <ThresholdsTableDockerIgnoredPrefixesSection {...props} />
         <ThresholdsTableDockerUpdateAlertsSection {...props} />
         <ThresholdsTableDockerServiceGapSection {...props} />
       </Show>
-      <ThresholdsTableDockerHostsSection {...props} />
-      <ThresholdsTableDockerContainersSection {...props} />
     </>
   );
 }
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableKubernetesTab.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableKubernetesTab.tsx
index 34876a7331..d2c2310b61 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableKubernetesTab.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableKubernetesTab.tsx
@@ -10,6 +10,7 @@ import { CollapsibleSection } from './Thresholds/sections/CollapsibleSection';
 import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
 import type { Resource } from '@/features/alerts/thresholds/tableTypes';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
 
 const KUBERNETES_WORKLOAD_COLUMNS = [
   'CPU %',
@@ -40,6 +41,7 @@ function KubernetesResourceSection(
       <CollapsibleSection
         id={props.id}
         title={props.title}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(props.columns, props.defaults)}
         resourceCount={props.resources().length}
         collapsed={state.isCollapsed(props.id)}
         onToggle={() => state.toggleSection(props.id)}
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxBackupsSection.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxBackupsSection.tsx
index e5461c875f..c4a547d7b3 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxBackupsSection.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxBackupsSection.tsx
@@ -15,6 +15,11 @@ import {
   reconcileWarningCriticalEdit,
 } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
+
+const BACKUP_THRESHOLD_COLUMNS = ['Fresh Hours', 'Stale Hours', 'Warning Days', 'Critical Days'];
+// Fresh and stale hours only colour the dashboard; the alert fires on days.
+const BACKUP_ALERT_SUMMARY_COLUMNS = ['Warning Days', 'Critical Days'];
 
 export function ThresholdsTableProxmoxBackupsSection(props: ThresholdsTableSectionProps) {
   const { state, tableProps } = props;
@@ -24,6 +29,10 @@ export function ThresholdsTableProxmoxBackupsSection(props: ThresholdsTableSecti
       <CollapsibleSection
         id="backups"
         title={state.sectionTitles.backups}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(
+          BACKUP_ALERT_SUMMARY_COLUMNS,
+          state.backupDefaultsRecord(),
+        )}
         collapsed={state.isCollapsed('backups')}
         onToggle={() => state.toggleSection('backups')}
         icon={<Archive class="w-5 h-5" />}
@@ -33,7 +42,7 @@ export function ThresholdsTableProxmoxBackupsSection(props: ThresholdsTableSecti
         <div ref={state.registerSection('backups')} class="scroll-mt-24">
           <ResourceTable
             title=""
-            columns={['Fresh Hours', 'Stale Hours', 'Warning Days', 'Critical Days']}
+            columns={BACKUP_THRESHOLD_COLUMNS}
             activeAlerts={tableProps.activeAlerts}
             onEdit={state.startEditing}
             onSaveEdit={state.saveEdit}
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxGuestDisksSection.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxGuestDisksSection.tsx
index f21488c6f7..4d478aa750 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxGuestDisksSection.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxGuestDisksSection.tsx
@@ -5,6 +5,9 @@ import { ResourceTable } from './ResourceTable';
 import { CollapsibleSection } from './Thresholds/sections/CollapsibleSection';
 import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
+
+const GUEST_DISK_THRESHOLD_COLUMNS = ['Disk %'];
 
 export function ThresholdsTableProxmoxGuestDisksSection(props: ThresholdsTableSectionProps) {
   const { state, tableProps } = props;
@@ -14,6 +17,9 @@ export function ThresholdsTableProxmoxGuestDisksSection(props: ThresholdsTableSe
       <CollapsibleSection
         id="guestDisks"
         title={state.sectionTitles.guestDisks}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(GUEST_DISK_THRESHOLD_COLUMNS, {
+          disk: tableProps.guestDefaults.disk,
+        })}
         resourceCount={state.guestDisksWithOverrides().length}
         collapsed={state.isCollapsed('guestDisks')}
         onToggle={() => state.toggleSection('guestDisks')}
@@ -26,7 +32,7 @@ export function ThresholdsTableProxmoxGuestDisksSection(props: ThresholdsTableSe
             title=""
             onConfigureResourceIntent={tableProps.onConfigureResourceIntent}
             groupedResources={state.guestDisksGroupedByGuest()}
-            columns={['Disk %']}
+            columns={GUEST_DISK_THRESHOLD_COLUMNS}
             activeAlerts={tableProps.activeAlerts}
             emptyMessage={state.GUEST_DISKS_FILTER_EMPTY_STATE}
             onEdit={state.startEditing}
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxGuestsSection.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxGuestsSection.tsx
index 71c161d74e..8e2cd38eea 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxGuestsSection.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxGuestsSection.tsx
@@ -5,6 +5,19 @@ import { ResourceTable } from './ResourceTable';
 import { CollapsibleSection } from './Thresholds/sections/CollapsibleSection';
 import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
+
+const GUEST_THRESHOLD_COLUMNS = [
+  'CPU %',
+  'Memory %',
+  'Disk %',
+  'Backup',
+  'Snapshot',
+  'Disk R MB/s',
+  'Disk W MB/s',
+  'Net In MB/s',
+  'Net Out MB/s',
+];
 
 export function ThresholdsTableProxmoxGuestsSection(props: ThresholdsTableSectionProps) {
   const { state, tableProps } = props;
@@ -14,6 +27,10 @@ export function ThresholdsTableProxmoxGuestsSection(props: ThresholdsTableSectio
       <CollapsibleSection
         id="guests"
         title={state.sectionTitles.guests}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(
+          GUEST_THRESHOLD_COLUMNS,
+          tableProps.guestDefaults,
+        )}
         resourceCount={tableProps.allGuests().length}
         collapsed={state.isCollapsed('guests')}
         onToggle={() => state.toggleSection('guests')}
@@ -27,17 +44,7 @@ export function ThresholdsTableProxmoxGuestsSection(props: ThresholdsTableSectio
             onConfigureResourceIntent={tableProps.onConfigureResourceIntent}
             groupedResources={state.guestsGroupedByNode()}
             groupHeaderMeta={state.guestGroupHeaderMeta()}
-            columns={[
-              'CPU %',
-              'Memory %',
-              'Disk %',
-              'Backup',
-              'Snapshot',
-              'Disk R MB/s',
-              'Disk W MB/s',
-              'Net In MB/s',
-              'Net Out MB/s',
-            ]}
+            columns={GUEST_THRESHOLD_COLUMNS}
             activeAlerts={tableProps.activeAlerts}
             emptyMessage={state.GUEST_THRESHOLDS_FILTER_EMPTY_STATE}
             onEdit={state.startEditing}
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxNodesSection.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxNodesSection.tsx
index e73984b29f..d56496e4a8 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxNodesSection.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxNodesSection.tsx
@@ -5,6 +5,9 @@ import { ResourceTable } from './ResourceTable';
 import { CollapsibleSection } from './Thresholds/sections/CollapsibleSection';
 import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
+
+const NODE_THRESHOLD_COLUMNS = ['CPU %', 'Memory %', 'Disk %', 'Temp °C'];
 
 export function ThresholdsTableProxmoxNodesSection(props: ThresholdsTableSectionProps) {
   const { state, tableProps } = props;
@@ -14,6 +17,10 @@ export function ThresholdsTableProxmoxNodesSection(props: ThresholdsTableSection
       <CollapsibleSection
         id="nodes"
         title={state.sectionTitles.nodes}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(
+          NODE_THRESHOLD_COLUMNS,
+          tableProps.nodeDefaults,
+        )}
         resourceCount={state.nodesWithOverrides().length}
         collapsed={state.isCollapsed('nodes')}
         onToggle={() => state.toggleSection('nodes')}
@@ -26,7 +33,7 @@ export function ThresholdsTableProxmoxNodesSection(props: ThresholdsTableSection
             title=""
             onConfigureResourceIntent={tableProps.onConfigureResourceIntent}
             resources={state.nodesWithOverrides()}
-            columns={['CPU %', 'Memory %', 'Disk %', 'Temp °C']}
+            columns={NODE_THRESHOLD_COLUMNS}
             activeAlerts={tableProps.activeAlerts}
             emptyMessage={state.NODE_THRESHOLDS_FILTER_EMPTY_STATE}
             onEdit={state.startEditing}
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxPBSSection.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxPBSSection.tsx
index 3a3f5d5bb2..927a484a28 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxPBSSection.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxPBSSection.tsx
@@ -5,6 +5,9 @@ import { ResourceTable } from './ResourceTable';
 import { CollapsibleSection } from './Thresholds/sections/CollapsibleSection';
 import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
+
+const PBS_THRESHOLD_COLUMNS = ['CPU %', 'Memory %'];
 
 export function ThresholdsTableProxmoxPBSSection(props: ThresholdsTableSectionProps) {
   const { state, tableProps } = props;
@@ -14,6 +17,10 @@ export function ThresholdsTableProxmoxPBSSection(props: ThresholdsTableSectionPr
       <CollapsibleSection
         id="pbs"
         title={state.sectionTitles.pbs}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(
+          PBS_THRESHOLD_COLUMNS,
+          tableProps.pbsDefaults ?? { cpu: 80, memory: 85 },
+        )}
         resourceCount={state.pbsServersWithOverrides().length}
         collapsed={state.isCollapsed('pbs')}
         onToggle={() => state.toggleSection('pbs')}
@@ -26,7 +33,7 @@ export function ThresholdsTableProxmoxPBSSection(props: ThresholdsTableSectionPr
             title=""
             onConfigureResourceIntent={tableProps.onConfigureResourceIntent}
             resources={state.pbsServersWithOverrides()}
-            columns={['CPU %', 'Memory %']}
+            columns={PBS_THRESHOLD_COLUMNS}
             activeAlerts={tableProps.activeAlerts}
             emptyMessage={state.PBS_THRESHOLDS_FILTER_EMPTY_STATE}
             onEdit={state.startEditing}
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxPMGSection.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxPMGSection.tsx
index 6bda08afce..a658b8d4ab 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxPMGSection.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxPMGSection.tsx
@@ -5,6 +5,26 @@ import { ResourceTable } from './ResourceTable';
 import { CollapsibleSection } from './Thresholds/sections/CollapsibleSection';
 import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
+
+const PMG_THRESHOLD_TABLE_COLUMNS = [
+  'Queue Warn',
+  'Queue Crit',
+  'Deferred Warn',
+  'Deferred Crit',
+  'Hold Warn',
+  'Hold Crit',
+  'Oldest Warn (min)',
+  'Oldest Crit (min)',
+  'Spam Warn',
+  'Spam Crit',
+  'Virus Warn',
+  'Virus Crit',
+  'Growth Warn %',
+  'Growth Warn Min',
+  'Growth Crit %',
+  'Growth Crit Min',
+];
 
 export function ThresholdsTableProxmoxPMGSection(props: ThresholdsTableSectionProps) {
   const { state, tableProps } = props;
@@ -14,6 +34,10 @@ export function ThresholdsTableProxmoxPMGSection(props: ThresholdsTableSectionPr
       <CollapsibleSection
         id="pmg"
         title={state.sectionTitles.pmg}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(
+          PMG_THRESHOLD_TABLE_COLUMNS,
+          state.pmgGlobalDefaults(),
+        )}
         resourceCount={state.pmgServersWithOverrides().length}
         collapsed={state.isCollapsed('pmg')}
         onToggle={() => state.toggleSection('pmg')}
@@ -26,24 +50,7 @@ export function ThresholdsTableProxmoxPMGSection(props: ThresholdsTableSectionPr
             title=""
             onConfigureResourceIntent={tableProps.onConfigureResourceIntent}
             resources={state.pmgServersWithOverrides()}
-            columns={[
-              'Queue Warn',
-              'Queue Crit',
-              'Deferred Warn',
-              'Deferred Crit',
-              'Hold Warn',
-              'Hold Crit',
-              'Oldest Warn (min)',
-              'Oldest Crit (min)',
-              'Spam Warn',
-              'Spam Crit',
-              'Virus Warn',
-              'Virus Crit',
-              'Growth Warn %',
-              'Growth Warn Min',
-              'Growth Crit %',
-              'Growth Crit Min',
-            ]}
+            columns={PMG_THRESHOLD_TABLE_COLUMNS}
             activeAlerts={tableProps.activeAlerts}
             emptyMessage={state.PMG_THRESHOLDS_FILTER_EMPTY_STATE}
             onEdit={state.startEditing}
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxSnapshotsSection.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxSnapshotsSection.tsx
index 7337186da4..ce49f035c3 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxSnapshotsSection.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxSnapshotsSection.tsx
@@ -8,6 +8,14 @@ import {
   reconcileWarningCriticalEdit,
 } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
+
+const SNAPSHOT_THRESHOLD_COLUMNS = [
+  'Warning Days',
+  'Critical Days',
+  'Warning Size (GiB)',
+  'Critical Size (GiB)',
+];
 
 export function ThresholdsTableProxmoxSnapshotsSection(props: ThresholdsTableSectionProps) {
   const { state, tableProps } = props;
@@ -17,6 +25,10 @@ export function ThresholdsTableProxmoxSnapshotsSection(props: ThresholdsTableSec
       <CollapsibleSection
         id="snapshots"
         title={state.sectionTitles.snapshots}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(
+          SNAPSHOT_THRESHOLD_COLUMNS,
+          state.snapshotDefaultsRecord(),
+        )}
         collapsed={state.isCollapsed('snapshots')}
         onToggle={() => state.toggleSection('snapshots')}
         icon={<Camera class="w-5 h-5" />}
@@ -26,7 +38,7 @@ export function ThresholdsTableProxmoxSnapshotsSection(props: ThresholdsTableSec
         <div ref={state.registerSection('snapshots')} class="scroll-mt-24">
           <ResourceTable
             title=""
-            columns={['Warning Days', 'Critical Days', 'Warning Size (GiB)', 'Critical Size (GiB)']}
+            columns={SNAPSHOT_THRESHOLD_COLUMNS}
             activeAlerts={tableProps.activeAlerts}
             onEdit={state.startEditing}
             onSaveEdit={state.saveEdit}
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxStorageSection.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxStorageSection.tsx
index bfdb4383e3..d273b3b656 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxStorageSection.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableProxmoxStorageSection.tsx
@@ -5,6 +5,9 @@ import { ResourceTable } from './ResourceTable';
 import { CollapsibleSection } from './Thresholds/sections/CollapsibleSection';
 import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
+
+const STORAGE_THRESHOLD_COLUMNS = ['Usage %'];
 
 export function ThresholdsTableProxmoxStorageSection(props: ThresholdsTableSectionProps) {
   const { state, tableProps } = props;
@@ -14,6 +17,9 @@ export function ThresholdsTableProxmoxStorageSection(props: ThresholdsTableSecti
       <CollapsibleSection
         id="storage"
         title={state.sectionTitles.storage}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(STORAGE_THRESHOLD_COLUMNS, {
+          usage: tableProps.storageDefault(),
+        })}
         resourceCount={tableProps.storage.length}
         collapsed={state.isCollapsed('storage')}
         onToggle={() => state.toggleSection('storage')}
@@ -27,7 +33,7 @@ export function ThresholdsTableProxmoxStorageSection(props: ThresholdsTableSecti
             onConfigureResourceIntent={tableProps.onConfigureResourceIntent}
             groupedResources={state.storageGroupedByNode()}
             groupHeaderMeta={state.guestGroupHeaderMeta()}
-            columns={['Usage %']}
+            columns={STORAGE_THRESHOLD_COLUMNS}
             activeAlerts={tableProps.activeAlerts}
             emptyMessage={state.STORAGE_THRESHOLDS_FILTER_EMPTY_STATE}
             onEdit={state.startEditing}
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableTrueNASTab.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableTrueNASTab.tsx
index 72a5e48ea4..5b70598a3f 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableTrueNASTab.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableTrueNASTab.tsx
@@ -8,6 +8,7 @@ import { CollapsibleSection } from './Thresholds/sections/CollapsibleSection';
 import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
 import type { Resource } from '@/features/alerts/thresholds/tableTypes';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
 
 const TRUENAS_SYSTEM_COLUMNS = [
   'CPU %',
@@ -47,6 +48,7 @@ function TrueNASResourceSection(
       <CollapsibleSection
         id={props.id}
         title={props.title}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(props.columns, props.defaults)}
         resourceCount={props.resources().length}
         collapsed={state.isCollapsed(props.id)}
         onToggle={() => state.toggleSection(props.id)}
diff --git a/frontend-modern/src/components/Alerts/ThresholdsTableVMwareTab.tsx b/frontend-modern/src/components/Alerts/ThresholdsTableVMwareTab.tsx
index 46968dfd50..f65d1fa72c 100644
--- a/frontend-modern/src/components/Alerts/ThresholdsTableVMwareTab.tsx
+++ b/frontend-modern/src/components/Alerts/ThresholdsTableVMwareTab.tsx
@@ -9,6 +9,7 @@ import { CollapsibleSection } from './Thresholds/sections/CollapsibleSection';
 import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
 import type { ThresholdsTableSectionProps } from '@/features/alerts/thresholds/thresholdsTableSectionProps';
 import type { Resource } from '@/features/alerts/thresholds/tableTypes';
+import { getAlertThresholdsDefaultsSummary } from '@/utils/alertThresholdsSectionPresentation';
 
 const VMWARE_HOST_COLUMNS = [
   'CPU %',
@@ -54,6 +55,7 @@ function VMwareResourceSection(
       <CollapsibleSection
         id={props.id}
         title={props.title}
+        defaultsSummary={getAlertThresholdsDefaultsSummary(props.columns, props.defaults)}
         resourceCount={props.resources().length}
         collapsed={state.isCollapsed(props.id)}
         onToggle={() => state.toggleSection(props.id)}
diff --git a/frontend-modern/src/features/alerts/__tests__/ThresholdsTab.test.tsx b/frontend-modern/src/features/alerts/__tests__/ThresholdsTab.test.tsx
index 05a3847c84..f73939890e 100644
--- a/frontend-modern/src/features/alerts/__tests__/ThresholdsTab.test.tsx
+++ b/frontend-modern/src/features/alerts/__tests__/ThresholdsTab.test.tsx
@@ -342,6 +342,18 @@ describe('ThresholdsTab', () => {
     });
   });
 
+  it('counts API-only CPU averaging overrides in the collapsed summary', () => {
+    const props = buildProps();
+    props.metricEvaluationWindows = () => ({ all: { cpu: 300 }, pod: { cpu: 60 } });
+    props.setMetricEvaluationWindows = vi.fn();
+
+    render(() => <ThresholdsTab {...props} />);
+
+    expect(document.querySelector('[data-cpu-averaging-summary]')?.textContent).toBe(
+      '5-minute average, 1 platform override',
+    );
+  });
+
   it('configures the canonical workload fallback and shows effective inheritance', () => {
     const props = buildProps();
     const setMetricEvaluationWindows = vi.fn();
@@ -356,12 +368,16 @@ describe('ThresholdsTab', () => {
     render(() => <ThresholdsTab {...props} />);
 
     const workloadWindow = screen.getAllByLabelText(
-      'All workloads CPU evaluation window',
+      'All workloads CPU averaging',
     )[0] as HTMLSelectElement;
     const virtualMachineWindow = screen.getAllByLabelText(
-      'Virtual machines CPU evaluation window',
+      'Virtual machines CPU averaging',
     )[0] as HTMLSelectElement;
     expect(workloadWindow.value).toBe('900');
+    expect(document.querySelector('[data-cpu-averaging]')?.hasAttribute('open')).toBe(false);
+    expect(document.querySelector('[data-cpu-averaging-summary]')?.textContent).toBe(
+      '5-minute average, 1 platform override',
+    );
     expect(virtualMachineWindow.options[0].textContent).toBe('Inherit (15 minutes)');
 
     fireEvent.input(workloadWindow, { target: { value: '60' } });
diff --git a/frontend-modern/src/features/alerts/tabs/ThresholdsTab.tsx b/frontend-modern/src/features/alerts/tabs/ThresholdsTab.tsx
index f04436c909..8f7b81bdb9 100644
--- a/frontend-modern/src/features/alerts/tabs/ThresholdsTab.tsx
+++ b/frontend-modern/src/features/alerts/tabs/ThresholdsTab.tsx
@@ -1,5 +1,5 @@
 import { createSignal, For, Show } from 'solid-js';
-import { Card } from '@/components/shared/Card';
+import ChevronRight from 'lucide-solid/icons/chevron-right';
 import { ThresholdsTable } from '@/components/Alerts/ThresholdsTable';
 import {
   AlertIntentPolicyPanel,
@@ -76,16 +76,31 @@ export function ThresholdsTab(props: ThresholdsTabProps) {
     });
     props.setHasUnsavedChanges(true);
   };
+  const averageLabel = (seconds: number) => {
+    if (seconds === 0) return 'Current value, no averaging';
+    if (seconds < 60) return `${seconds}-second average`;
+    return `${seconds / 60}-minute average`;
+  };
+  const cpuWindowSummary = () => {
+    const windows = props.metricEvaluationWindows?.() ?? {};
+    const lead = averageLabel(windows.all?.cpu ?? 300);
+    // Count every configured profile, including ones only the API sets (such
+    // as pod), so the line never claims one window for every resource.
+    const overrides = Object.entries(windows).filter(
+      ([key, profile]) => key !== 'all' && profile?.cpu !== undefined,
+    ).length;
+    return overrides === 0
+      ? `${lead} for every resource`
+      : `${lead}, ${overrides} platform override${overrides === 1 ? '' : 's'}`;
+  };
   const evaluationProfileControl = (profile: (typeof evaluationProfiles)[number]) => {
     const configured = () => props.metricEvaluationWindows?.()[profile.key]?.cpu;
     return (
-      <label class="block rounded-lg border border-gray-200 p-3 dark:border-gray-700">
-        <span class="block text-xs font-medium text-gray-700 dark:text-gray-300">
-          {profile.label}
-        </span>
+      <label class="block rounded-md border border-border p-3">
+        <span class="block text-xs font-medium text-base-content">{profile.label}</span>
         <select
-          aria-label={`${profile.label} CPU evaluation window`}
-          class="mt-2 w-full rounded-md border border-gray-300 bg-white px-2 py-1.5 text-sm text-gray-900 dark:border-gray-600 dark:bg-gray-800 dark:text-gray-100"
+          aria-label={`${profile.label} CPU averaging`}
+          class="mt-2 w-full rounded-md border border-border bg-surface px-2 py-1.5 text-sm text-base-content"
           value={
             profile.key === 'all'
               ? String(configured() ?? 300)
@@ -101,9 +116,9 @@ export function ThresholdsTab(props: ThresholdsTabProps) {
             </option>
           </Show>
           <option value="0">Current value</option>
-          <option value="60">1 minute average</option>
-          <option value="300">5 minute average</option>
-          <option value="900">15 minute average</option>
+          <option value="60">1-minute average</option>
+          <option value="300">5-minute average</option>
+          <option value="900">15-minute average</option>
         </select>
       </label>
     );
@@ -115,44 +130,38 @@ export function ThresholdsTab(props: ThresholdsTabProps) {
         resources={props.allResources}
         selectionTarget={intentSelectionTarget()}
       />
+      {/*
+        CPU averaging is tuning, not the page's answer. It stays one line that
+        states the effective setting, so the default limits below lead and the
+        ten per-platform selects open only for someone changing them.
+      */}
       <Show when={props.metricEvaluationWindows && props.setMetricEvaluationWindows}>
-        <Card padding="md">
-          <div class="space-y-4">
-            <div>
-              <h3 class="text-sm font-semibold text-gray-900 dark:text-gray-100">
-                CPU evaluation window
-              </h3>
-              <p class="mt-1 text-sm text-gray-600 dark:text-gray-400">
-                Pulse averages CPU over time before applying trigger and recovery thresholds. This
-                filters harmless bursts without delaying a sustained incident or splitting its
-                timeline.
-              </p>
-            </div>
+        <details class="group rounded-md border border-border bg-surface" data-cpu-averaging>
+          <summary class="flex min-h-11 cursor-pointer list-none items-center gap-2 px-4 py-2.5 text-sm focus-visible:outline-solid focus-visible:outline-2 focus-visible:-outline-offset-2 focus-visible:outline-blue-500 [&::-webkit-details-marker]:hidden">
+            <ChevronRight
+              class="h-4 w-4 shrink-0 text-muted transition-transform group-open:rotate-90"
+              aria-hidden="true"
+            />
+            <span class="shrink-0 font-semibold text-base-content">CPU averaging</span>
+            <span class="min-w-0 text-muted sm:truncate" data-cpu-averaging-summary>
+              {cpuWindowSummary()}
+            </span>
+          </summary>
+          <div class="space-y-3 border-t border-border px-4 py-3">
+            <p class="text-sm text-muted">
+              Pulse averages CPU over time before applying trigger and recovery thresholds. This
+              filters harmless bursts without delaying a sustained incident or splitting its
+              timeline.
+            </p>
             <div class="grid gap-3 sm:grid-cols-2 xl:grid-cols-3">
-              <For each={evaluationProfiles}>
-                {(profile) => (
-                  <div class={profile.key === 'all' ? 'block' : 'hidden sm:block'}>
-                    {evaluationProfileControl(profile)}
-                  </div>
-                )}
-              </For>
+              <For each={evaluationProfiles}>{(profile) => evaluationProfileControl(profile)}</For>
             </div>
-            <details class="rounded-lg border border-gray-200 p-3 sm:hidden dark:border-gray-700">
-              <summary class="cursor-pointer text-sm font-medium text-gray-800 dark:text-gray-200">
-                Platform overrides
-              </summary>
-              <div class="mt-3 space-y-3">
-                <For each={evaluationProfiles.slice(1)}>
-                  {(profile) => evaluationProfileControl(profile)}
-                </For>
-              </div>
-            </details>
-            <p class="text-xs text-gray-500 dark:text-gray-400">
+            <p class="text-xs text-muted">
               A rolling rule waits for enough recent, gap-free samples. If history is incomplete,
               Pulse holds the existing incident state instead of firing or resolving on weak data.
             </p>
           </div>
-        </Card>
+        </details>
       </Show>
       <ThresholdsTable
         onConfigureResourceIntent={configureResourceIntent}
diff --git a/frontend-modern/src/utils/__tests__/alertThresholdsSectionPresentation.test.ts b/frontend-modern/src/utils/__tests__/alertThresholdsSectionPresentation.test.ts
index 805a0367f7..e5145b690d 100644
--- a/frontend-modern/src/utils/__tests__/alertThresholdsSectionPresentation.test.ts
+++ b/frontend-modern/src/utils/__tests__/alertThresholdsSectionPresentation.test.ts
@@ -2,7 +2,9 @@ import { describe, expect, it } from 'vitest';
 import {
   ALERT_THRESHOLDS_SECTION_DISABLED_LABEL,
   ALERT_THRESHOLDS_SECTION_UNSAVED_CHANGES_TITLE,
+  getAlertThresholdsDefaultsSummary,
   getAlertThresholdsSectionDisabledLabel,
+  getDockerContainerRuleSummaryItems,
   getAlertThresholdsSectionUnsavedChangesTitle,
 } from '@/utils/alertThresholdsSectionPresentation';
 
@@ -13,4 +15,98 @@ describe('alertThresholdsSectionPresentation', () => {
     expect(getAlertThresholdsSectionDisabledLabel()).toBe('Disabled');
     expect(getAlertThresholdsSectionUnsavedChangesTitle()).toBe('Unsaved changes');
   });
+
+  it('names the enabled default limits a threshold group alerts on', () => {
+    expect(
+      getAlertThresholdsDefaultsSummary(
+        ['CPU %', 'Memory %', 'Disk %', 'Backup', 'Snapshot', 'Disk R MB/s', 'Net In MB/s'],
+        { cpu: 80, memory: 85, disk: 90, diskRead: 0, networkIn: -1 },
+      ),
+    ).toBe('Defaults: CPU 80% · Memory 85% · Disk 90%');
+    expect(
+      getAlertThresholdsDefaultsSummary(
+        ['CPU %', 'Memory %', 'Disk %', 'Disk R MB/s', 'Net In MB/s'],
+        {
+          cpu: 80,
+          memory: 85,
+          disk: 90,
+          diskRead: 50,
+          networkIn: 100,
+        },
+      ),
+    ).toBe('Defaults: CPU 80% · Memory 85% · Disk 90% · Disk read 50 MB/s · +1 more');
+  });
+
+  it('reads day, hour, size and percent units from the column label', () => {
+    expect(
+      getAlertThresholdsDefaultsSummary(
+        ['Warning Days', 'Critical Days', 'Warning Size (GiB)', 'Critical Size (GiB)'],
+        { 'warning days': 30, 'critical days': 1, warningSizeGiB: 0, criticalSizeGiB: 0 },
+      ),
+    ).toBe('Defaults: Warning 30 days · Critical 1 day');
+    expect(
+      getAlertThresholdsDefaultsSummary(['Fresh Hours', 'Stale Hours'], {
+        'fresh hours': 24,
+        'stale hours': 72,
+      }),
+    ).toBe('Defaults: Fresh 24 hours · Stale 72 hours');
+    expect(
+      getAlertThresholdsDefaultsSummary(['Restart Count', 'Restart Window (s)', 'Memory Warn %'], {
+        restartCount: 3,
+        restartWindow: 300,
+        memoryWarnPct: 90,
+      }),
+    ).toBe('Defaults: Restart Count 3 · Restart Window 300s · Memory Warn 90%');
+  });
+
+  it('says when every metric alert is off and stays silent without numeric defaults', () => {
+    expect(getAlertThresholdsDefaultsSummary(['CPU %', 'Memory %'], { cpu: 0, memory: -1 })).toBe(
+      'Defaults: all metric alerts off',
+    );
+    expect(getAlertThresholdsDefaultsSummary([], { cpu: 80 })).toBeUndefined();
+    expect(getAlertThresholdsDefaultsSummary(['Backup'], { cpu: 80 })).toBeUndefined();
+    expect(getAlertThresholdsDefaultsSummary(['CPU %'], undefined)).toBeUndefined();
+  });
+
+  it('states Docker restart-loop and memory-limit rules with their effective fallbacks', () => {
+    expect(
+      getDockerContainerRuleSummaryItems({
+        restartCount: 3,
+        restartWindow: 300,
+        memoryWarnPct: 90,
+        memoryCriticalPct: 95,
+      }),
+    ).toEqual(['Restart loop 3 in 5 min', 'Memory limit 90% warn, 95% critical']);
+    // Config normalization replaces <= 0 with the fallbacks, so these rules
+    // never read as Off.
+    expect(
+      getDockerContainerRuleSummaryItems({
+        restartCount: -1,
+        restartWindow: 0,
+        memoryWarnPct: 0,
+        memoryCriticalPct: -1,
+      }),
+    ).toEqual(['Restart loop 3 in 5 min', 'Memory limit 90% warn, 95% critical']);
+    expect(getDockerContainerRuleSummaryItems({ restartCount: 5, restartWindow: 90 })[0]).toBe(
+      'Restart loop 5 in 90s',
+    );
+    expect(
+      getAlertThresholdsDefaultsSummary(
+        ['CPU %', 'Memory %', 'Disk %'],
+        { cpu: 0, memory: 0, disk: 0 },
+        { ruleItems: getDockerContainerRuleSummaryItems({}) },
+      ),
+    ).toBe('Defaults: Restart loop 3 in 5 min · Memory limit 90% warn, 95% critical');
+  });
+
+  it('summarizes backup alerts by their day thresholds only', () => {
+    expect(
+      getAlertThresholdsDefaultsSummary(['Warning Days', 'Critical Days'], {
+        'fresh hours': 24,
+        'stale hours': 72,
+        'warning days': 0,
+        'critical days': 0,
+      }),
+    ).toBe('Defaults: all metric alerts off');
+  });
 });
diff --git a/frontend-modern/src/utils/alertThresholdsSectionPresentation.ts b/frontend-modern/src/utils/alertThresholdsSectionPresentation.ts
index 7b749cc75e..ef95d4131c 100644
--- a/frontend-modern/src/utils/alertThresholdsSectionPresentation.ts
+++ b/frontend-modern/src/utils/alertThresholdsSectionPresentation.ts
@@ -1,3 +1,9 @@
+import {
+  isAlertResourceMetricOff,
+  normalizeAlertResourceMetricKey,
+} from '@/components/Alerts/alertResourceTableModel';
+import { formatMetricValue } from '@/features/alerts/thresholds/helpers';
+
 export const ALERT_THRESHOLDS_SECTION_DISABLED_LABEL = 'Disabled';
 export const ALERT_THRESHOLDS_SECTION_UNSAVED_CHANGES_TITLE = 'Unsaved changes';
 
@@ -8,3 +14,124 @@ export function getAlertThresholdsSectionDisabledLabel() {
 export function getAlertThresholdsSectionUnsavedChangesTitle() {
   return ALERT_THRESHOLDS_SECTION_UNSAVED_CHANGES_TITLE;
 }
+
+const ALERT_THRESHOLDS_DEFAULTS_SUMMARY_MAX_ITEMS = 4;
+
+type DefaultsSummaryUnit = {
+  suffix: string;
+  format: (key: string, value: number, label: string) => string;
+};
+
+// Unit suffixes as they appear in threshold column labels. The label loses the
+// suffix and the value gains it, so "CPU %" at 80 reads "CPU 80%".
+const DEFAULTS_SUMMARY_UNITS: DefaultsSummaryUnit[] = [
+  { suffix: ' %', format: (key, value, label) => `${label} ${formatPercent(key, value)}` },
+  { suffix: ' °C', format: (key, value, label) => `${label} ${formatMetricValue(key, value)}` },
+  { suffix: ' MB/s', format: (_key, value, label) => `${label} ${value} MB/s` },
+  { suffix: ' (GiB)', format: (key, value, label) => `${label} ${formatMetricValue(key, value)}` },
+  { suffix: ' (s)', format: (_key, value, label) => `${label} ${value}s` },
+  { suffix: ' (min)', format: (_key, value, label) => `${label} ${value} min` },
+  { suffix: ' Days', format: (_key, value, label) => `${label} ${value} ${plural(value, 'day')}` },
+  {
+    suffix: ' Hours',
+    format: (_key, value, label) => `${label} ${value} ${plural(value, 'hour')}`,
+  },
+];
+
+const DEFAULTS_SUMMARY_LABELS: Record<string, string> = {
+  'Disk R': 'Disk read',
+  'Disk W': 'Disk write',
+  'Net In': 'Net in',
+  'Net Out': 'Net out',
+  'Disk Temp': 'Disk temp',
+};
+
+const formatPercent = (key: string, value: number) => {
+  const formatted = formatMetricValue(key, value);
+  return formatted.endsWith('%') ? formatted : `${formatted}%`;
+};
+
+const plural = (value: number, unit: string) => (value === 1 ? unit : `${unit}s`);
+
+const describeDefault = (column: string, value: number): string => {
+  const key = normalizeAlertResourceMetricKey(column);
+  const trimmed = column.trim();
+  for (const unit of DEFAULTS_SUMMARY_UNITS) {
+    if (trimmed.endsWith(unit.suffix)) {
+      const base = trimmed.slice(0, -unit.suffix.length);
+      return unit.format(key, value, DEFAULTS_SUMMARY_LABELS[base] ?? base);
+    }
+  }
+  return `${DEFAULTS_SUMMARY_LABELS[trimmed] ?? trimmed} ${formatMetricValue(key, value)}`;
+};
+
+// One line naming what a threshold group alerts on by default, so the page
+// answers "what will alert me" before any group is opened. It reads the same
+// columns and defaults the group's table edits. Metrics the engine treats as
+// off (isAlertResourceMetricOff, trigger <= 0) are left out. Columns with no
+// numeric default, such as the Backup and Snapshot toggles, are skipped.
+// `ruleItems` carries rules that are not plain per-metric limits and are
+// already described in words (see getDockerContainerRuleSummaryItems).
+export function getAlertThresholdsDefaultsSummary(
+  columns: readonly string[],
+  defaults: Record<string, number | undefined> | undefined,
+  options: { ruleItems?: readonly string[]; maxItems?: number } = {},
+): string | undefined {
+  if (!defaults) return undefined;
+  const ruleItems = options.ruleItems ?? [];
+  const numericColumns = columns.filter((column) => {
+    const value = defaults[normalizeAlertResourceMetricKey(column)];
+    return typeof value === 'number' && Number.isFinite(value);
+  });
+  if (numericColumns.length === 0 && ruleItems.length === 0) return undefined;
+  const items = [
+    ...numericColumns
+      .filter(
+        (column) => !isAlertResourceMetricOff(defaults[normalizeAlertResourceMetricKey(column)]),
+      )
+      .map((column) => describeDefault(column, defaults[normalizeAlertResourceMetricKey(column)]!)),
+    ...ruleItems,
+  ];
+  if (items.length === 0) return 'Defaults: all metric alerts off';
+  const maxItems = options.maxItems ?? ALERT_THRESHOLDS_DEFAULTS_SUMMARY_MAX_ITEMS;
+  const shown = items.slice(0, maxItems);
+  const hidden = items.length - shown.length;
+  return `Defaults: ${shown.join(' · ')}${hidden > 0 ? ` · +${hidden} more` : ''}`;
+}
+
+// Docker's restart-loop and memory-limit rules always run: config
+// normalization (internal/alerts/config/normalize.go, NormalizeDockerDefaults)
+// replaces any value <= 0 with these fallbacks. So the summary states the
+// effective rule rather than treating zero as Off, and pairs the restart count
+// with its window because neither means anything alone.
+const DOCKER_RULE_FALLBACKS = {
+  restartCount: 3,
+  restartWindow: 300,
+  memoryWarnPct: 90,
+  memoryCriticalPct: 95,
+} as const;
+
+const effectiveDockerRule = (value: number | undefined, fallback: number) =>
+  typeof value === 'number' && Number.isFinite(value) && value > 0 ? value : fallback;
+
+const formatRestartWindow = (seconds: number) =>
+  seconds % 60 === 0 ? `${seconds / 60} min` : `${seconds}s`;
+
+export function getDockerContainerRuleSummaryItems(defaults: {
+  restartCount?: number;
+  restartWindow?: number;
+  memoryWarnPct?: number;
+  memoryCriticalPct?: number;
+}): string[] {
+  const restarts = effectiveDockerRule(defaults.restartCount, DOCKER_RULE_FALLBACKS.restartCount);
+  const window = effectiveDockerRule(defaults.restartWindow, DOCKER_RULE_FALLBACKS.restartWindow);
+  const warn = effectiveDockerRule(defaults.memoryWarnPct, DOCKER_RULE_FALLBACKS.memoryWarnPct);
+  const critical = effectiveDockerRule(
+    defaults.memoryCriticalPct,
+    DOCKER_RULE_FALLBACKS.memoryCriticalPct,
+  );
+  return [
+    `Restart loop ${restarts} in ${formatRestartWindow(window)}`,
+    `Memory limit ${warn}% warn, ${critical}% critical`,
+  ];
+}