play_audio

THE RISK

High Risk

Why play_audio needs a policy

Playing audio is an execution action that interacts with the host system's audio subsystem. It is not a simple read (data retrieval) nor a write (data creation/modification); it triggers an external side effect (audio playback). Misuse could involve playing unexpected or harmful audio content, but blast radius is moderate.

From the tool's definition "Play an audio file" — triggers playback of a file on the host system, an external operation whose effects depend on the file path argument.

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

POLICY

How to control play_audio

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 play_audio:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "play_audio": {
      "limits": [
        {
          "counter": "play_audio_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

play_audio 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.

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.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

High-risk tools in MiniMax MCP JS → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-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.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about play_audio

What does the play_audio tool do? +

Play an audio file. Supports WAV and MP3 formats. Does not support video. It is categorised as a Execute tool in the MiniMax MCP JS MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on play_audio? +

Register the MiniMax MCP JS MCP server in PolicyLayer and add a rule for play_audio: 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 play_audio? +

play_audio is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit play_audio? +

Yes. Add a rate_limit block to the play_audio 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 play_audio completely? +

Set action: deny in the PolicyLayer policy for play_audio. 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 play_audio? +

play_audio 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 →