voice_design

THE RISK

Critical Risk

Why voice_design needs a policy

The tool explicitly warns it 'may incur costs' by calling the MiniMax API, meaning each invocation can create a financial obligation. Per the rules, Financial ranks highest and applies when a tool commits financial obligations. Severity is medium since individual API calls typically have limited but real monetary impact, though repeated misuse could accumulate costs.

From the tool's definition This tool calls MiniMax API and may incur costs.

Documented attack patterns abuse exactly the kind of access voice_design gives an agent:

POLICY

How to control voice_design

PolicyLayer is an MCP gateway — it sits between your AI agents and MiniMax MCP JS, and nothing reaches the server without passing your rules. This is the rule we recommend for voice_design:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "voice_design": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to voice_design is blocked until a human approves it. The rest of the server keeps working.

Create a free account and register MiniMax MCP JS — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

GATE THIS TOOL →

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EXPLORE

Related tools and policies

More MiniMax MCP JS tools

Financial generate_video Generate a video based on text prompts.\n\nNote: This tool calls MiniMax API and may incur Financial image_to_video Generate a video based on an image.\n\nNote: This tool calls MiniMax API and may incur cos Financial music_generation Create a music generation task using AI models. Generate music from prompt and lyrics.\n\n Financial text_to_audio Convert text to audio with a given voice and save the output audio file to a given directo Financial text_to_image Generate images based on text prompts.\n\nNote: This tool calls MiniMax API and may incur Financial voice_clone Clone a voice using the provided audio file. New voices will incur costs when first used.\ Execute play_audio Play an audio file. Supports WAV and MP3 formats. Does not support video. Read list_voices List all available voices. Only supported when api_host is https://api.minimax.chat.

All 10 MiniMax MCP JS tools →

Financial tools on other servers

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Go deeper

Critical-risk tools in MiniMax MCP JS → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

Questions about voice_design

What does the voice_design tool do? +

Generate a voice based on description prompts.\n\nNote: This tool calls MiniMax API and may incur costs. Use only when explicitly requested by the user. It is categorised as a Financial tool in the MiniMax MCP JS MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on voice_design? +

Register the MiniMax MCP JS MCP server in PolicyLayer and add a rule for voice_design: 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 MiniMax MCP JS. Nothing to install.

What risk level is voice_design? +

voice_design is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit voice_design? +

Yes. Add a rate_limit block to the voice_design 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.

How do I block voice_design completely? +

Set action: deny in the PolicyLayer policy for voice_design. 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.

What MCP server provides voice_design? +

voice_design is provided by the MiniMax MCP JS MCP server (minimax-ai/minimax-mcp-js). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MiniMax MCP JS tool call.

Start from MiniMax MCP JS, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →