fm8_panic · FM8 MCP Server MCP: Risk & Policy

WHAT IT DOES

What fm8_panic does on FM8 MCP Server

AI agents invoke fm8_panic to trigger actions in FM8 MCP Server. 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 IT NEEDS A POLICY

Why fm8_panic needs a policy

This tool triggers external operations on FM8 synthesizer hardware/software via MIDI messages (reset, sound off, notes off). It executes commands with immediate real-time effects on an external system. While it's a safety/emergency stop function, it actively sends multiple MIDI control messages that affect the synthesizer's state.

From the tool's definition Sends Reset All Controllers, All Sound Off, and All Notes Off to FM8. Use this to immediately silence all sounds.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

fm8_panic Rate-limited

fm8_panic 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "fm8_panic": {
      "limits": [
        {
          "counter": "fm8_panic_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches FM8 MCP Server, so you can run agents against it safely.

FAQ

Questions about fm8_panic

What does the fm8_panic tool do? +

Emergency stop! Sends Reset All Controllers, All Sound Off, and All Notes Off to FM8. Use this to immediately silence all sounds. It is categorised as a Execute tool in the FM8 MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on fm8_panic? +

Register the FM8 MCP Server MCP server in PolicyLayer and add a rule for fm8_panic: 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 FM8 MCP Server. Nothing to install.

What risk level is fm8_panic? +

fm8_panic is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit fm8_panic? +

Yes. Add a rate_limit block to the fm8_panic 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 fm8_panic completely? +

Set action: deny in the PolicyLayer policy for fm8_panic. 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 fm8_panic? +

fm8_panic is provided by the FM8 MCP Server MCP server (thesigma1receptor/fm8mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.