diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4123d1d9a9c..1ace21f40a2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@ Docs: https://docs.openclaw.ai
 ### Fixes
 
 - TTS/Telegram: keep trusted local audio generated by the TTS tool queued for voice-note delivery even when the run-level built-in tool list omits the raw `tts` name. Fixes #74752. Thanks @Loveworld3033 and @andyliu.
+- TTS: require explicit user or config audio intent for the agent speech tool so dashboard chats stay text unless audio is requested. Fixes #69777. Thanks @alexandre-leng.
 - Heartbeat: strip legacy `[TOOL_CALL]...[/TOOL_CALL]` and `[TOOL_RESULT]...[/TOOL_RESULT]` pseudo-call blocks from heartbeat replies before channel delivery. Fixes #54138. Thanks @Deniable9570.
 - macOS/Voice Wake: send wake-word and Push-to-Talk transcripts through the selected macOS session target instead of always falling back to main WebChat. Fixes #51040. Thanks @carl-jeffrolc.
 - Providers/xAI: give Grok `web_search` a 60s default timeout, harden malformed xAI Responses parsing, and return structured timeout errors instead of aborting the tool call. Fixes #58063 and #58733. Thanks @dnishimura, @marvcasasola-svg, and @Nanako0129.
diff --git a/docs/tools/tts.md b/docs/tools/tts.md
index 8231921767e..45c66429793 100644
--- a/docs/tools/tts.md
+++ b/docs/tools/tts.md
@@ -48,6 +48,9 @@ audio attachments everywhere else, and PCM/Ulaw streams for telephony and Talk.
 <Note>
 Auto-TTS is **off** by default. When `messages.tts.provider` is unset,
 OpenClaw picks the first configured provider in registry auto-select order.
+The built-in `tts` agent tool is explicit-intent only: ordinary chat stays
+text unless the user asks for audio, uses `/tts`, or enables Auto-TTS/directive
+speech.
 </Note>
 
 ## Supported providers
diff --git a/src/agents/openclaw-tools.tts-config.test.ts b/src/agents/openclaw-tools.tts-config.test.ts
index f84a56f735d..a592fbedf6a 100644
--- a/src/agents/openclaw-tools.tts-config.test.ts
+++ b/src/agents/openclaw-tools.tts-config.test.ts
@@ -168,6 +168,27 @@ describe("createOpenClawTools TTS config wiring", () => {
     }
   });
 
+  it("keeps direct TTS tool guidance explicit even when the tool is available", async () => {
+    const { __testing, createOpenClawTools } = await import("./openclaw-tools.js");
+    __testing.setDepsForTest({ config: {} });
+
+    try {
+      const tool = createOpenClawTools({
+        disableMessageTool: true,
+        disablePluginTools: true,
+      }).find((candidate) => candidate.name === "tts");
+
+      if (!tool) {
+        throw new Error("missing tts tool");
+      }
+
+      expect(tool.description).toContain("Use only for explicit audio intent");
+      expect(tool.description).toContain("Never use for ordinary text replies");
+    } finally {
+      __testing.setDepsForTest();
+    }
+  });
+
   it("passes the resolved session agent id into the tts tool", async () => {
     const injectedConfig = {
       agents: {
diff --git a/src/agents/tools/tts-tool.test.ts b/src/agents/tools/tts-tool.test.ts
index c78cf85f701..b32e888151b 100644
--- a/src/agents/tools/tts-tool.test.ts
+++ b/src/agents/tools/tts-tool.test.ts
@@ -17,6 +17,14 @@ describe("createTtsTool", () => {
     expect(tool.description).toContain(SILENT_REPLY_TOKEN);
   });
 
+  it("requires explicit user or config audio intent in guidance text", () => {
+    const tool = createTtsTool();
+
+    expect(tool.description).toContain("Use only for explicit audio intent");
+    expect(tool.description).toContain("active TTS config");
+    expect(tool.description).toContain("Never use for ordinary text replies");
+  });
+
   it("stores audio delivery in details.media and preserves the spoken text in content", async () => {
     textToSpeechSpy.mockResolvedValue({
       success: true,
diff --git a/src/agents/tools/tts-tool.ts b/src/agents/tools/tts-tool.ts
index 3b8386bb195..715dc5ab4e4 100644
--- a/src/agents/tools/tts-tool.ts
+++ b/src/agents/tools/tts-tool.ts
@@ -64,7 +64,9 @@ export function createTtsTool(opts?: {
     label: "TTS",
     name: "tts",
     displaySummary: "Convert text to speech and return audio.",
-    description: `Convert text to speech. Audio is delivered automatically from the tool result — reply with ${SILENT_REPLY_TOKEN} after a successful call to avoid duplicate messages.`,
+    description:
+      "Use only for explicit audio intent (audio, voice, speech, TTS) or active TTS config. Never use for ordinary text replies. " +
+      `Audio is delivered automatically from the tool result — reply with ${SILENT_REPLY_TOKEN} after a successful call to avoid duplicate messages.`,
     parameters: TtsToolSchema,
     execute: async (_toolCallId, args) => {
       const params = args as Record<string, unknown>;
diff --git a/src/tts/tts-config.test.ts b/src/tts/tts-config.test.ts
index f3a7d6b9d17..c935b1abd9f 100644
--- a/src/tts/tts-config.test.ts
+++ b/src/tts/tts-config.test.ts
@@ -46,6 +46,17 @@ describe("shouldAttemptTtsPayload", () => {
     expect(shouldAttemptTtsPayload({ cfg: {} as OpenClawConfig })).toBe(false);
   });
 
+  it("does not infer automatic TTS from a dashboard text turn without opt-in state", () => {
+    expect(
+      shouldAttemptTtsPayload({
+        cfg: {} as OpenClawConfig,
+        agentId: "main",
+        channelId: "webchat",
+        accountId: "dashboard",
+      }),
+    ).toBe(false);
+  });
+
   it("honors session auto state before prefs and config", () => {
     writeFileSync(prefsPath, JSON.stringify({ tts: { auto: "off" } }));
     const cfg = { messages: { tts: { auto: "off" } } } as OpenClawConfig;