Speak a short message aloud to the user through their speakers.

Use this to deliver a spoken TL;DR alongside (not instead of) your written answer: 1-3 conversational sentences summarizing the outcome, a finding, or a question. Never read code, file paths, or long explanations aloud.

You send only the text: voice, speed and language belong to the daemon (the user controls them on the dashboard). To deliberately switch your voice, call change_voice.

Concurrent speech is serialized: by default a new call WAITS for the current utterance to finish (queued), and for the user to finish speaking. Set interrupt=True to cut the current utterance off and speak immediately — use it only when your previous words are now stale (e.g. the user corrected you mid-answer).

Args: text: What to say. Plain conversational prose. Mark the key words the listener must catch with markdown bold (like this) — they get vocal emphasis and show bold on the live dashboard. Also supports inline speech tags like [pause] or [laugh] and wrapping tags like text. interrupt: Cut off any utterance currently playing and speak now. speaker: ONLY for subagents. If you are a subagent (Task/Agent tool), pass your role name here (e.g. "researcher") — the dashboard shows the message under that name with its own portrait, and the daemon gives you a stable voice distinct from the main agent's. The main agent must leave this empty.

Speak a quick spoken update WITHOUT waiting for it to finish.

Fire-and-forget: use this to tell the user what you just did and keep working ("done with X, moving on") — it returns immediately and plays in the background, queued behind any current speech. Use speak instead when you are asking a question or otherwise waiting for the user's reply. Like speak, it carries only text — voice/speed/language live in the daemon.

Deliberately switch this agent's speaking voice from now on.

Updates your character in the listener daemon: the dashboard shows the new voice and every later speak/announce uses it (it also persists across restarts). Use list_voices to see the options. Speak itself carries no voice information — this call is the only way to change how you sound, so use it consciously (e.g. when the user asks for it).

Args: voice_id: Which voice to switch to. speaker: Move a named SPEAKER's voice instead of your own — the personas you address with speak(speaker=...). A voice already held by someone else is refused rather than duplicated, so two speakers never become indistinguishable by ear.

List the Grok TTS voices available for the speak tool.