diff --git a/src/Backend/AutopilotMonitor.Functions/Functions/Metrics/GetGeographicLocationSessionsFunction.cs b/src/Backend/AutopilotMonitor.Functions/Functions/Metrics/GetGeographicLocationSessionsFunction.cs
index 7e071625..e68c0685 100644
--- a/src/Backend/AutopilotMonitor.Functions/Functions/Metrics/GetGeographicLocationSessionsFunction.cs
+++ b/src/Backend/AutopilotMonitor.Functions/Functions/Metrics/GetGeographicLocationSessionsFunction.cs
@@ -50,9 +50,13 @@ namespace AutopilotMonitor.Functions.Functions.Metrics
                 if (days > 365) days = 365;
 
                 var groupBy = query["groupBy"] ?? "city";
+                // Default response shape is lean (~15 fields/row) so MCP-driven callers fit
+                // many sessions in a single response. UI sets ?full=1 to opt back into the
+                // full LocationSessionRow shape.
+                var full = string.Equals(query["full"], "1", StringComparison.Ordinal);
 
-                _logger.LogInformation("Fetching sessions for location '{LocationKey}' tenant {TenantId} ({Days}d, groupBy={GroupBy})",
-                    locationKey, tenantId, days, groupBy);
+                _logger.LogInformation("Fetching sessions for location '{LocationKey}' tenant {TenantId} ({Days}d, groupBy={GroupBy}, full={Full})",
+                    locationKey, tenantId, days, groupBy, full);
 
                 var cutoff = DateTime.UtcNow.AddDays(-days);
                 var sessions = await _maintenanceRepo.GetSessionsByDateRangeAsync(cutoff, DateTime.UtcNow.AddDays(1), tenantId);
@@ -62,7 +66,15 @@ namespace AutopilotMonitor.Functions.Functions.Metrics
                 var rows = BuildRows(filtered, appSummaries);
 
                 var response = req.CreateResponse(HttpStatusCode.OK);
-                await response.WriteAsJsonAsync(new { success = true, sessions = rows, totalCount = rows.Count });
+                if (full)
+                {
+                    await response.WriteAsJsonAsync(new { success = true, sessions = rows, totalCount = rows.Count });
+                }
+                else
+                {
+                    var lean = rows.Select(ToLeanRow).ToList();
+                    await response.WriteAsJsonAsync(new { success = true, sessions = lean, totalCount = lean.Count });
+                }
                 return response;
             }
             catch (Exception ex)
@@ -99,5 +111,33 @@ namespace AutopilotMonitor.Functions.Functions.Metrics
             }
             return rows;
         }
+
+        /// <summary>
+        /// Lean projection used as the default response shape. Fields chosen to support
+        /// the typical MCP triage flow (which session, when, where, how big a deal, was
+        /// DO active) while keeping per-row payload an order of magnitude smaller than
+        /// the full <see cref="LocationSessionRow"/>. Callers needing the full shape
+        /// pass <c>?full=1</c>.
+        /// </summary>
+        internal static object ToLeanRow(LocationSessionRow r) => new
+        {
+            sessionId = r.SessionId,
+            tenantId = r.TenantId,
+            serialNumber = r.SerialNumber,
+            deviceName = r.DeviceName,
+            manufacturer = r.Manufacturer,
+            model = r.Model,
+            startedAt = r.StartedAt,
+            completedAt = r.CompletedAt,
+            status = r.Status,
+            failureReason = r.FailureReason,
+            durationSeconds = r.DurationSeconds,
+            enrollmentType = r.EnrollmentType,
+            geoCountry = r.GeoCountry,
+            geoCity = r.GeoCity,
+            totalAppCount = r.TotalAppCount,
+            hasDoTelemetry = r.HasDoTelemetry,
+            doPercentPeerCaching = r.DoPercentPeerCaching,
+        };
     }
 }
diff --git a/src/Backend/AutopilotMonitor.Functions/Functions/Metrics/GetGlobalGeographicLocationSessionsFunction.cs b/src/Backend/AutopilotMonitor.Functions/Functions/Metrics/GetGlobalGeographicLocationSessionsFunction.cs
index 74c1cbcb..b447bfcd 100644
--- a/src/Backend/AutopilotMonitor.Functions/Functions/Metrics/GetGlobalGeographicLocationSessionsFunction.cs
+++ b/src/Backend/AutopilotMonitor.Functions/Functions/Metrics/GetGlobalGeographicLocationSessionsFunction.cs
@@ -47,19 +47,35 @@ namespace AutopilotMonitor.Functions.Functions.Metrics
                     days = parsedDays;
 
                 var groupBy = query["groupBy"] ?? "city";
+                var full = string.Equals(query["full"], "1", StringComparison.Ordinal);
+                // Optional tenantId filter so a GA can scope a single tenant's sessions
+                // for a location without leaving the cross-tenant endpoint.
+                var filterTenantId = query["tenantId"];
 
-                _logger.LogInformation("Fetching global sessions for location '{LocationKey}' ({Days}d, groupBy={GroupBy}) (User: {UserEmail})",
-                    locationKey, days, groupBy, userEmail);
+                _logger.LogInformation("Fetching global sessions for location '{LocationKey}' ({Days}d, groupBy={GroupBy}, full={Full}, tenantFilter={Tenant}) (User: {UserEmail})",
+                    locationKey, days, groupBy, full, filterTenantId ?? "(none)", userEmail);
 
                 var cutoff = DateTime.UtcNow.AddDays(-days);
-                var sessions = await _maintenanceRepo.GetSessionsByDateRangeAsync(cutoff, DateTime.UtcNow.AddDays(1));
+                var sessions = string.IsNullOrEmpty(filterTenantId)
+                    ? await _maintenanceRepo.GetSessionsByDateRangeAsync(cutoff, DateTime.UtcNow.AddDays(1))
+                    : await _maintenanceRepo.GetSessionsByDateRangeAsync(cutoff, DateTime.UtcNow.AddDays(1), filterTenantId);
                 var filtered = GetGeographicLocationSessionsFunction.FilterSessionsByLocation(sessions, locationKey, groupBy);
 
-                var appSummaries = await _metricsRepo.GetAllAppInstallSummariesAsync();
+                var appSummaries = string.IsNullOrEmpty(filterTenantId)
+                    ? await _metricsRepo.GetAllAppInstallSummariesAsync()
+                    : await _metricsRepo.GetAppInstallSummariesByTenantAsync(filterTenantId);
                 var rows = GetGeographicLocationSessionsFunction.BuildRows(filtered, appSummaries);
 
                 var response = req.CreateResponse(HttpStatusCode.OK);
-                await response.WriteAsJsonAsync(new { success = true, sessions = rows, totalCount = rows.Count });
+                if (full)
+                {
+                    await response.WriteAsJsonAsync(new { success = true, sessions = rows, totalCount = rows.Count });
+                }
+                else
+                {
+                    var lean = rows.Select(GetGeographicLocationSessionsFunction.ToLeanRow).ToList();
+                    await response.WriteAsJsonAsync(new { success = true, sessions = lean, totalCount = lean.Count });
+                }
                 return response;
             }
             catch (Exception ex)
diff --git a/src/Web/autopilot-monitor-web/lib/api.ts b/src/Web/autopilot-monitor-web/lib/api.ts
index dcbca23d..cfb90665 100644
--- a/src/Web/autopilot-monitor-web/lib/api.ts
+++ b/src/Web/autopilot-monitor-web/lib/api.ts
@@ -176,10 +176,13 @@ export const api = {
       `${API_BASE_URL}/api/metrics/geographic${qs({ tenantId, days: String(days), groupBy })}`,
     globalGeographic: (days: number, groupBy: string, tenantId?: string) =>
       `${API_BASE_URL}/api/global/metrics/geographic${qs({ days: String(days), groupBy, tenantId })}`,
+    // ?full=1 — UI needs the full LocationSessionRow shape for the page table; default
+    // is now lean (~15 fields/row) so MCP-driven callers fit many sessions in a single
+    // response.
     geographicSessions: (tenantId: string, days: number, groupBy: string, locationKey: string) =>
-      `${API_BASE_URL}/api/metrics/geographic/sessions${qs({ tenantId, days: String(days), groupBy, locationKey })}`,
+      `${API_BASE_URL}/api/metrics/geographic/sessions${qs({ tenantId, days: String(days), groupBy, locationKey, full: '1' })}`,
     globalGeographicSessions: (days: number, groupBy: string, locationKey: string) =>
-      `${API_BASE_URL}/api/global/metrics/geographic/sessions${qs({ days: String(days), groupBy, locationKey })}`,
+      `${API_BASE_URL}/api/global/metrics/geographic/sessions${qs({ days: String(days), groupBy, locationKey, full: '1' })}`,
     platform: (opts?: { limit?: number; days?: number }) =>
       `${API_BASE_URL}/api/global/metrics/platform${qs({
         limit: opts?.limit?.toString(),