diff --git a/plugins/ask-user-question/src/server-harness.test.ts b/plugins/ask-user-question/src/server-harness.test.ts
index fb9ca1174..50ba91782 100644
--- a/plugins/ask-user-question/src/server-harness.test.ts
+++ b/plugins/ask-user-question/src/server-harness.test.ts
@@ -85,6 +85,20 @@ describe("provider gating", () => {
     },
   );
 
+  it.each(["codex", "pi", "acp-cursor"])(
+    "does not prescribe provider-specific plan tools to %s",
+    async (providerId) => {
+      const host = createHost();
+      const resolved = await host.harness.resolveAgentConfiguration(
+        configurationContext(providerId),
+      );
+      expect(resolved.tools).toHaveLength(1);
+      expect(resolved.tools[0]?.description).not.toMatch(
+        /EnterPlanMode|ExitPlanMode/,
+      );
+    },
+  );
+
   it("advertises multiSelect as optional and defaults it during execution", async () => {
     const host = createHost();
     const resolved = await host.harness.resolveAgentConfiguration(