Convert text to speech using the configured TTS engine (Chatterbox Turbo or Kokoro). For Chatterbox Turbo, use paralinguistic tags directly in text for expressive speech: [laugh], [sigh], [cough], [chuckle], [gasp], [groan], [clear throat], [sniff], [shush]. Supports voice cloning via reference a...
Part of the Local Voice server.
Free to start. No card required.
AI agents may call synthesize_text to permanently remove or destroy resources in Local Voice. Without a policy, an autonomous agent could delete critical data in a loop with no way to undo the damage. PolicyLayer blocks destructive tools by default and requires explicit human approval before enabling them.
Without a policy, an AI agent could call synthesize_text in a loop, permanently destroying resources in Local Voice. There is no undo for destructive operations. PolicyLayer blocks this tool by default and only allows it when a human explicitly approves the action.
Destructive tools permanently remove data. Block by default. Only enable with explicit approval workflows.
{
"version": "1",
"default": "deny",
"hide": [
"synthesize_text"
]
}See the full Local Voice policy for all 3 tools.
These attack patterns abuse exactly the kind of access synthesize_text gives an agent. Each links to the full case and the policy that stops it:
Other destructive tools across the catalogue. The same approach applies to each: deny by default, or require human approval.
Convert text to speech using the configured TTS engine (Chatterbox Turbo or Kokoro). For Chatterbox Turbo, use paralinguistic tags directly in text for expressive speech: [laugh], [sigh], [cough], [chuckle], [gasp], [groan], [clear throat], [sniff], [shush]. Supports voice cloning via reference audio.. It is categorised as a Destructive tool in the Local Voice MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Local Voice MCP server in PolicyLayer and add a rule for synthesize_text: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Local Voice. Nothing to install.
synthesize_text is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the synthesize_text rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for synthesize_text. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
synthesize_text is provided by the Local Voice MCP server (@codecraftersllc/local-voice-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 3 Local Voice tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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