diff --git a/src/agents/tools/subagents-tool.test.ts b/src/agents/tools/subagents-tool.test.ts
index 6fdfcea8cfb..9ae06770ca6 100644
--- a/src/agents/tools/subagents-tool.test.ts
+++ b/src/agents/tools/subagents-tool.test.ts
@@ -5,7 +5,8 @@ describe("subagents tool", () => {
   it("does not advertise sessions_yield as unconditionally available", () => {
     const tool = createSubagentsTool();
 
-    expect(tool.description).toContain("If sessions_yield is available");
-    expect(tool.description).not.toContain("Use sessions_yield to wait");
+    expect(tool.description).toBe(
+      "On-demand list, kill, or steer spawned sub-agents for this requester session. If sessions_yield is available, use it to wait for completion events; do not poll this tool in wait loops.",
+    );
   });
 });