diff --git a/src/agents/tools/message-tool.test.ts b/src/agents/tools/message-tool.test.ts
index 3f08e2c3c..84e25fd30 100644
--- a/src/agents/tools/message-tool.test.ts
+++ b/src/agents/tools/message-tool.test.ts
@@ -148,7 +148,7 @@ describe("message tool schema scoping", () => {
     label: "Discord",
     docsPath: "/channels/discord",
     blurb: "Discord test plugin.",
-    actions: ["send", "poll"],
+    actions: ["send", "poll", "poll-vote"],
   });
 
   afterEach(() => {
@@ -161,14 +161,14 @@ describe("message tool schema scoping", () => {
       expectComponents: false,
       expectButtons: true,
       expectButtonStyle: true,
-      expectedActions: ["send", "react", "poll"],
+      expectedActions: ["send", "react", "poll", "poll-vote"],
     },
     {
       provider: "discord",
       expectComponents: true,
       expectButtons: false,
       expectButtonStyle: false,
-      expectedActions: ["send", "poll", "react"],
+      expectedActions: ["send", "poll", "poll-vote", "react"],
     },
   ])(
     "scopes schema fields for $provider",
@@ -209,6 +209,9 @@ describe("message tool schema scoping", () => {
       for (const action of expectedActions) {
         expect(actionEnum).toContain(action);
       }
+      expect(properties.pollId).toBeDefined();
+      expect(properties.pollOptionIndex).toBeDefined();
+      expect(properties.pollOptionId).toBeDefined();
     },
   );
 });
diff --git a/src/agents/tools/message-tool.ts b/src/agents/tools/message-tool.ts
index 098368fe9..27f72868c 100644
--- a/src/agents/tools/message-tool.ts
+++ b/src/agents/tools/message-tool.ts
@@ -277,6 +277,34 @@ function buildPollSchema() {
     pollOption: Type.Optional(Type.Array(Type.String())),
     pollDurationHours: Type.Optional(Type.Number()),
     pollMulti: Type.Optional(Type.Boolean()),
+    pollId: Type.Optional(Type.String()),
+    pollOptionId: Type.Optional(
+      Type.String({
+        description: "Poll answer id to vote for. Use when the channel exposes stable answer ids.",
+      }),
+    ),
+    pollOptionIds: Type.Optional(
+      Type.Array(
+        Type.String({
+          description:
+            "Poll answer ids to vote for in a multiselect poll. Use when the channel exposes stable answer ids.",
+        }),
+      ),
+    ),
+    pollOptionIndex: Type.Optional(
+      Type.Number({
+        description:
+          "1-based poll option number to vote for, matching the rendered numbered poll choices.",
+      }),
+    ),
+    pollOptionIndexes: Type.Optional(
+      Type.Array(
+        Type.Number({
+          description:
+            "1-based poll option numbers to vote for in a multiselect poll, matching the rendered numbered poll choices.",
+        }),
+      ),
+    ),
   };
 }
 
diff --git a/src/channels/plugins/message-action-names.ts b/src/channels/plugins/message-action-names.ts
index 649bb6ce8..809d239be 100644
--- a/src/channels/plugins/message-action-names.ts
+++ b/src/channels/plugins/message-action-names.ts
@@ -2,6 +2,7 @@ export const CHANNEL_MESSAGE_ACTION_NAMES = [
   "send",
   "broadcast",
   "poll",
+  "poll-vote",
   "react",
   "reactions",
   "read",
diff --git a/src/infra/outbound/message-action-spec.ts b/src/infra/outbound/message-action-spec.ts
index 641cc3620..b49a60c69 100644
--- a/src/infra/outbound/message-action-spec.ts
+++ b/src/infra/outbound/message-action-spec.ts
@@ -7,6 +7,7 @@ export const MESSAGE_ACTION_TARGET_MODE: Record<ChannelMessageActionName, Messag
     send: "to",
     broadcast: "none",
     poll: "to",
+    "poll-vote": "to",
     react: "to",
     reactions: "to",
     read: "to",