diff --git a/src/agents/pi-embedded-subscribe.handlers.tools.media.test.ts b/src/agents/pi-embedded-subscribe.handlers.tools.media.test.ts
index e1c2274564a..87879676854 100644
--- a/src/agents/pi-embedded-subscribe.handlers.tools.media.test.ts
+++ b/src/agents/pi-embedded-subscribe.handlers.tools.media.test.ts
@@ -231,7 +231,11 @@ describe("handleToolExecutionEnd media emission", () => {
   });
 
   it("still queues structured media when verbose is full", async () => {
-    const ctx = createMockContext({ shouldEmitToolOutput: true, onToolResult: vi.fn() });
+    const ctx = createMockContext({
+      shouldEmitToolOutput: true,
+      onToolResult: vi.fn(),
+      toolResultFormat: "plain",
+    });
 
     await handleToolExecutionEnd(ctx, {
       type: "tool_execution_end",
@@ -254,6 +258,34 @@ describe("handleToolExecutionEnd media emission", () => {
     expect(ctx.state.pendingToolAudioAsVoice).toBe(true);
   });
 
+  it("does not queue a duplicate voice copy when emitted tool output already sent the same audio", async () => {
+    const ctx = createMockContext({
+      shouldEmitToolOutput: true,
+      onToolResult: vi.fn(),
+      toolResultFormat: "plain",
+    });
+
+    await handleToolExecutionEnd(ctx, {
+      type: "tool_execution_end",
+      toolName: "tts",
+      toolCallId: "tc-1",
+      isError: false,
+      result: {
+        content: [{ type: "text", text: "Generated audio reply.\nMEDIA:/tmp/reply.opus" }],
+        details: {
+          media: {
+            mediaUrl: "/tmp/reply.opus",
+            audioAsVoice: true,
+          },
+        },
+      },
+    });
+
+    expect(ctx.emitToolOutput).toHaveBeenCalled();
+    expect(ctx.state.pendingToolMediaUrls).toEqual([]);
+    expect(ctx.state.pendingToolAudioAsVoice).toBe(false);
+  });
+
   async function handleVerboseGeneratedImage(toolResultFormat: "plain" | "markdown") {
     const ctx = createMockContext({
       shouldEmitToolOutput: true,
diff --git a/src/agents/pi-embedded-subscribe.handlers.tools.ts b/src/agents/pi-embedded-subscribe.handlers.tools.ts
index 8c67904288a..90ec01ec475 100644
--- a/src/agents/pi-embedded-subscribe.handlers.tools.ts
+++ b/src/agents/pi-embedded-subscribe.handlers.tools.ts
@@ -544,7 +544,7 @@ async function emitToolResultOutput(params: {
     ctx.builtinToolNames,
   );
   const pendingMediaUrls =
-    mediaReply.audioAsVoice || emittedToolOutputMediaUrls.length === 0
+    emittedToolOutputMediaUrls.length === 0
       ? mediaUrls
       : mediaUrls.filter((url) => !emittedToolOutputMediaUrls.includes(url));
   if (pendingMediaUrls.length === 0) {