List voice reference clips for voice cloning. These are audio samples that can be used as reference audio for TTS engines that support voice cloning (like Chatterbox, XTTS, CosyVoice).
AI agents call list_voice_references to retrieve information from DMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only query operation to retrieve voice reference metadata. It retrieves or exposes existing data without creating, modifying, deleting, or executing operations. While the clips could theoretically be used for voice cloning (a generative capability), the tool itself only lists references—it does not perform cloning, synthesis, or side effects.
From the tool's definition Tool description states it 'List[s] voice reference clips' - a retrieval operation with no modification of data. The tool is explicitly documented as listing/querying existing audio samples for reference purposes only.
Documented attack patterns abuse exactly the kind of access list_voice_references gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and DMCP, and nothing reaches the server without passing your rules. This is the rule we recommend for list_voice_references:
{
"version": "1",
"default": "deny",
"tools": {
"list_voice_references": {}
}
}list_voice_references is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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List voice reference clips for voice cloning. These are audio samples that can be used as reference audio for TTS engines that support voice cloning (like Chatterbox, XTTS, CosyVoice). It is categorised as a Read tool in the DMCP MCP Server, which means it retrieves data without modifying state.
Register the D MCP server in PolicyLayer and add a rule for list_voice_references: 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 DMCP. Nothing to install.
list_voice_references is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_voice_references 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 list_voice_references. 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.
list_voice_references is provided by the D MCP server (shawnrushefsky/dmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from DMCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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