diff --git a/app/src/components/settings/panels/ToolPolicyDiagnosticsPanel.tsx b/app/src/components/settings/panels/ToolPolicyDiagnosticsPanel.tsx
index 635cd7b50..232d58f8d 100644
--- a/app/src/components/settings/panels/ToolPolicyDiagnosticsPanel.tsx
+++ b/app/src/components/settings/panels/ToolPolicyDiagnosticsPanel.tsx
@@ -59,7 +59,7 @@ const ToolPolicyDiagnosticsPanel = () => {
     (async () => {
       try {
         const diagnostics = await callCoreRpc<ToolPolicyDiagnostics>({
-          method: 'tool_registry.diagnostics',
+          method: 'openhuman.tool_registry_diagnostics',
           params: {},
           timeoutMs: 10_000,
         });
diff --git a/app/src/components/settings/panels/__tests__/ToolPolicyDiagnosticsPanel.test.tsx b/app/src/components/settings/panels/__tests__/ToolPolicyDiagnosticsPanel.test.tsx
index 5acebee96..f61b23de0 100644
--- a/app/src/components/settings/panels/__tests__/ToolPolicyDiagnosticsPanel.test.tsx
+++ b/app/src/components/settings/panels/__tests__/ToolPolicyDiagnosticsPanel.test.tsx
@@ -44,7 +44,9 @@ describe('ToolPolicyDiagnosticsPanel', () => {
     expect(screen.getByText(/Total tools/i)).toBeInTheDocument();
     expect(screen.getAllByText('10').length).toBeGreaterThan(0);
     expect(screen.getByText(/Recent \(24h\): 5/i)).toBeInTheDocument();
-    expect(hoisted.callCoreRpc).toHaveBeenCalled();
+    expect(hoisted.callCoreRpc).toHaveBeenCalledWith(
+      expect.objectContaining({ method: 'openhuman.tool_registry_diagnostics' })
+    );
   });
 
   test('renders unavailable card when the RPC throws', async () => {