diff --git a/CHANGELOG.md b/CHANGELOG.md
index 18924ab581..e8c5054cd8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@
 - **feat(cli-tools):** add Crush CLI tool to the dashboard with one-click configuration. (thanks @dopaemon)
 - **feat(dashboard):** suggest HuggingFace Hub media models in the media provider view. (thanks @yicone)
 - **feat(dashboard):** collapse quota rows and sort by remaining quota in the usage view. (thanks @j2-cuong)
+- **feat(dashboard):** add a settings toggle for tool-source diagnostics logging. (thanks @DuyPrX)
 
 ### 🔧 Bug Fixes
 
diff --git a/src/app/(dashboard)/dashboard/settings/advanced/page.tsx b/src/app/(dashboard)/dashboard/settings/advanced/page.tsx
index 803fbfe47c..5dfefd170b 100644
--- a/src/app/(dashboard)/dashboard/settings/advanced/page.tsx
+++ b/src/app/(dashboard)/dashboard/settings/advanced/page.tsx
@@ -1,6 +1,7 @@
 "use client";
 
 import DebugModeCard from "../components/DebugModeCard";
+import LogToolSourcesCard from "../components/LogToolSourcesCard";
 import PayloadRulesTab from "../components/PayloadRulesTab";
 import RequestLimitsTab from "../components/RequestLimitsTab";
 import CliproxyapiSettingsTab from "../components/CliproxyapiSettingsTab";
@@ -9,6 +10,7 @@ export default function SettingsAdvancedPage() {
   return (
     <div className="space-y-6">
       <DebugModeCard />
+      <LogToolSourcesCard />
       <PayloadRulesTab />
       <RequestLimitsTab />
       <CliproxyapiSettingsTab />
diff --git a/src/app/(dashboard)/dashboard/settings/components/LogToolSourcesCard.tsx b/src/app/(dashboard)/dashboard/settings/components/LogToolSourcesCard.tsx
new file mode 100644
index 0000000000..d64575e993
--- /dev/null
+++ b/src/app/(dashboard)/dashboard/settings/components/LogToolSourcesCard.tsx
@@ -0,0 +1,70 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { Card, Toggle } from "@/shared/components";
+import { useTranslations } from "next-intl";
+
+export default function LogToolSourcesCard() {
+  const [logToolSources, setLogToolSources] = useState(false);
+  const [loading, setLoading] = useState(true);
+  const t = useTranslations("settings");
+
+  useEffect(() => {
+    let mounted = true;
+
+    async function loadSettings() {
+      setLoading(true);
+      try {
+        const res = await fetch("/api/settings", { cache: "no-store" });
+        if (res.ok && mounted) {
+          const data = await res.json();
+          setLogToolSources(data.logToolSources === true);
+        }
+      } catch {
+        // Leave the current switch state in place if settings cannot be loaded.
+      } finally {
+        if (mounted) setLoading(false);
+      }
+    }
+
+    loadSettings();
+    return () => {
+      mounted = false;
+    };
+  }, []);
+
+  const updateLogToolSources = async (value: boolean) => {
+    const previousValue = logToolSources;
+    setLogToolSources(value);
+    try {
+      const res = await fetch("/api/settings", {
+        method: "PATCH",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ logToolSources: value }),
+      });
+      if (!res.ok) setLogToolSources(previousValue);
+    } catch (err) {
+      setLogToolSources(previousValue);
+      console.error("Failed to update logToolSources:", err);
+    }
+  };
+
+  return (
+    <Card>
+      <div className="flex items-center justify-between gap-4">
+        <div className="flex items-center gap-3">
+          <div className="p-2 rounded-lg bg-primary/10 text-primary">
+            <span className="material-symbols-outlined text-[20px]" aria-hidden="true">
+              troubleshoot
+            </span>
+          </div>
+          <div>
+            <h3 className="text-lg font-semibold">{t("logToolSourcesToggle")}</h3>
+            <p className="text-sm text-muted-foreground">{t("logToolSourcesDescription")}</p>
+          </div>
+        </div>
+        <Toggle checked={logToolSources} onChange={updateLogToolSources} disabled={loading} />
+      </div>
+    </Card>
+  );
+}
diff --git a/src/i18n/messages/en.json b/src/i18n/messages/en.json
index b9189d9eb1..fa7bccd64b 100644
--- a/src/i18n/messages/en.json
+++ b/src/i18n/messages/en.json
@@ -4995,6 +4995,8 @@
     "modelsDevInfoOrder": "User Override → models.dev → LiteLLM → Hardcoded Default",
     "systemTheme": "System Theme",
     "debugToggle": "Enable Debug Mode",
+    "logToolSourcesToggle": "Log Tool Sources",
+    "logToolSourcesDescription": "Emit a diagnostic log line per request summarizing tool count and MCP/hosted/client source breakdown.",
     "homePinProviderQuotaToHome": "Pin Information to Home Page",
     "homeProviderQuotaLimits": "Provider Quota Limits",
     "homeProviderQuotaLimitsDesc": "Pin the Provider Quota status container (with Refresh All button) to the top of the Home page.",
diff --git a/src/shared/validation/settingsSchemas.ts b/src/shared/validation/settingsSchemas.ts
index 3d53665875..2341b21c18 100644
--- a/src/shared/validation/settingsSchemas.ts
+++ b/src/shared/validation/settingsSchemas.ts
@@ -144,6 +144,7 @@ export const updateSettingsSchema = z.object({
     .optional(),
   customBannedSignals: z.array(z.string().max(200)).optional(),
   debugMode: z.boolean().optional(),
+  logToolSources: z.boolean().optional(),
   hiddenSidebarItems: z.array(z.enum(HIDEABLE_SIDEBAR_ITEM_IDS)).optional(),
   hiddenSidebarGroupLabels: z.array(z.enum(HIDEABLE_SIDEBAR_GROUP_IDS)).optional(),
   sidebarSectionOrder: z
diff --git a/tests/unit/settings-ui-layout-static.test.ts b/tests/unit/settings-ui-layout-static.test.ts
index e9f50ee7a1..278b938d12 100644
--- a/tests/unit/settings-ui-layout-static.test.ts
+++ b/tests/unit/settings-ui-layout-static.test.ts
@@ -59,6 +59,25 @@ test("Debug mode moved to the top of Advanced settings", () => {
   assertInOrder(advancedPage, ["<DebugModeCard", "<PayloadRulesTab"]);
 });
 
+test("Log Tool Sources toggle is mounted in Advanced settings next to Debug mode", () => {
+  const advancedPage = readSrc("src/app/(dashboard)/dashboard/settings/advanced/page.tsx");
+
+  assertInOrder(advancedPage, ["<DebugModeCard", "<LogToolSourcesCard", "<PayloadRulesTab"]);
+
+  const card = readSrc(
+    "src/app/(dashboard)/dashboard/settings/components/LogToolSourcesCard.tsx"
+  );
+  assert.match(card, /t\("logToolSourcesToggle"\)/);
+  assert.match(card, /t\("logToolSourcesDescription"\)/);
+  assert.match(card, /logToolSources: value/);
+
+  const schema = readSrc("src/shared/validation/settingsSchemas.ts");
+  assert.match(schema, /logToolSources: z\.boolean\(\)\.optional\(\)/);
+
+  const en = readSrc("src/i18n/messages/en.json");
+  assert.match(en, /"logToolSourcesToggle": "Log Tool Sources"/);
+});
+
 test("Proxy Logs table uses the same blue row hover emphasis as Logs", () => {
   const proxyLogger = readSrc("src/shared/components/ProxyLogger.tsx");
   const requestLogger = readSrc("src/shared/components/RequestLoggerV2.tsx");