diff --git a/extensions/signal/src/message-actions.test.ts b/extensions/signal/src/message-actions.test.ts
index fd0621935416..c4763635a8bc 100644
--- a/extensions/signal/src/message-actions.test.ts
+++ b/extensions/signal/src/message-actions.test.ts
@@ -61,9 +61,11 @@ describe("signalMessageActions", () => {
     );
   });
 
-  it("skips send for plugin dispatch", () => {
+  it("supports only reactions for plugin dispatch", () => {
     expect(signalMessageActions.supportsAction?.({ action: "send" })).toBe(false);
     expect(signalMessageActions.supportsAction?.({ action: "react" })).toBe(true);
+    expect(signalMessageActions.supportsAction?.({ action: "delete" })).toBe(false);
+    expect(signalMessageActions.supportsAction?.({ action: "pin" })).toBe(false);
   });
 
   it("blocks reactions when the action gate is disabled", async () => {
diff --git a/extensions/signal/src/message-actions.ts b/extensions/signal/src/message-actions.ts
index 0fc52179a25d..6073863346d2 100644
--- a/extensions/signal/src/message-actions.ts
+++ b/extensions/signal/src/message-actions.ts
@@ -96,7 +96,7 @@ export const signalMessageActions: ChannelMessageActionAdapter = {
 
     return { actions: Array.from(actions) };
   },
-  supportsAction: ({ action }) => action !== "send",
+  supportsAction: ({ action }) => action === "react",
 
   handleAction: async ({ action, params, cfg, accountId, toolContext }) => {
     if (action === "send") {