diff --git a/src/tts/tts-core.test.ts b/src/tts/tts-core.test.ts
new file mode 100644
index 00000000000..10e2d2e7972
--- /dev/null
+++ b/src/tts/tts-core.test.ts
@@ -0,0 +1,42 @@
+import { describe, expect, it, vi } from "vitest";
+import { MAX_TIMER_TIMEOUT_MS } from "../shared/number-coercion.js";
+import { summarizeText } from "./tts-core.js";
+import type { ResolvedTtsConfig } from "./tts-types.js";
+
+describe("TTS core", () => {
+  it("clamps oversized summarization timeout timers", async () => {
+    const setTimeoutSpy = vi.spyOn(globalThis, "setTimeout");
+    try {
+      const model = { provider: { id: "test-provider" } };
+      const config = {
+        summarizeModel: { primary: "test-provider/test-model" },
+      } as ResolvedTtsConfig;
+
+      const result = await summarizeText(
+        {
+          text: "Long text that should be summarized for speech.",
+          targetLength: 120,
+          cfg: {},
+          config,
+          timeoutMs: MAX_TIMER_TIMEOUT_MS + 1,
+        },
+        {
+          completeSimple: vi.fn(async () => ({
+            content: [{ type: "text", text: "Short summary." }],
+            stopReason: "stop",
+            usage: {},
+          })),
+          getApiKeyForModel: vi.fn(async () => "key"),
+          prepareModelForSimpleCompletion: vi.fn(() => model as never),
+          requireApiKey: vi.fn(() => "key"),
+          resolveModelAsync: vi.fn(async () => ({ model })),
+        },
+      );
+
+      expect(result.summary).toBe("Short summary.");
+      expect(setTimeoutSpy).toHaveBeenCalledWith(expect.any(Function), MAX_TIMER_TIMEOUT_MS);
+    } finally {
+      setTimeoutSpy.mockRestore();
+    }
+  });
+});
diff --git a/src/tts/tts-core.ts b/src/tts/tts-core.ts
index 8df372e7958..084ad6045ad 100644
--- a/src/tts/tts-core.ts
+++ b/src/tts/tts-core.ts
@@ -11,6 +11,7 @@ import { prepareModelForSimpleCompletion } from "../agents/simple-completion-tra
 import type { OpenClawConfig } from "../config/types.js";
 import { completeSimple } from "../llm/stream.js";
 import type { TextContent } from "../llm/types.js";
+import { resolveTimerTimeoutMs } from "../shared/number-coercion.js";
 import type { ResolvedTtsConfig } from "./tts-types.js";
 export {
   normalizeApplyTextNormalization,
@@ -105,7 +106,8 @@ export async function summarizeText(
 
   try {
     const controller = new AbortController();
-    const timeout = setTimeout(() => controller.abort(), timeoutMs);
+    const resolvedTimeoutMs = resolveTimerTimeoutMs(timeoutMs, 1);
+    const timeout = setTimeout(() => controller.abort(), resolvedTimeoutMs);
 
     try {
       const res = await deps.completeSimple(