This record as markdown: /tools/libi/voice-clone.md
What voice_clone does on Libi
AI agents invoke voice_clone to trigger actions in Libi. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why voice_clone is rated High
Clones a voice via external ElevenLabs API, triggering external biometric audio generation.
From the tool's definition voice_clone, ElevenLabs mirror, test-mode
Attacks that exploit this kind of access
The rule that runs voice_clone safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Libi, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For voice_clone, this is the rule to start with:
voice_clone stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Libi, apply this rule, and every voice_clone call is checked against it from then on.
Questions about voice_clone
Test-mode ElevenLabs mirror. It is categorised as a Execute tool in the Libi MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Libi MCP server in PolicyLayer and add a rule for voice_clone: 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 Libi. Nothing to install.
voice_clone is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the voice_clone 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 voice_clone. 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.
voice_clone is provided by the Libi MCP server (Nagellabs/libi). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on Libi, and thousands of servers like it.
This server
Across the catalogue