diff --git a/extensions/telegram/src/channel-actions.test.ts b/extensions/telegram/src/channel-actions.test.ts
index c08295d09f0..fbcde4bc903 100644
--- a/extensions/telegram/src/channel-actions.test.ts
+++ b/extensions/telegram/src/channel-actions.test.ts
@@ -367,6 +367,25 @@ describe("telegramMessageActions", () => {
     expect(discovery?.actions).not.toContain("react");
   });
 
+  it("advertises poll duration as a positive integer in message tool schema", () => {
+    const cfg = {
+      channels: {
+        telegram: {
+          botToken: "tok",
+          actions: { poll: true },
+        },
+      },
+    } as OpenClawConfig;
+
+    const discovery = telegramMessageActions.describeMessageTool?.({ cfg });
+    const schema = Array.isArray(discovery?.schema) ? discovery.schema[0] : undefined;
+
+    expect(schema?.properties.pollDurationSeconds).toMatchObject({
+      type: "integer",
+      minimum: 1,
+    });
+  });
+
   it("matches runtime account-key normalization during SecretRef-tolerant discovery", () => {
     const cfg = {
       channels: {
diff --git a/extensions/telegram/src/message-tool-schema.ts b/extensions/telegram/src/message-tool-schema.ts
index 1956d9cc9f9..94f27216a1f 100644
--- a/extensions/telegram/src/message-tool-schema.ts
+++ b/extensions/telegram/src/message-tool-schema.ts
@@ -1,8 +1,9 @@
+import { optionalPositiveIntegerSchema } from "openclaw/plugin-sdk/channel-actions";
 import { Type } from "typebox";
 
 export function createTelegramPollExtraToolSchemas() {
   return {
-    pollDurationSeconds: Type.Optional(Type.Number()),
+    pollDurationSeconds: optionalPositiveIntegerSchema(),
     pollAnonymous: Type.Optional(Type.Boolean()),
     pollPublic: Type.Optional(Type.Boolean()),
   };