solo_track · FluidSynth MCP Server MCP: Risk & Policy

WHAT IT DOES

What solo_track does on FluidSynth MCP Server

AI agents use solo_track to create or update resources in FluidSynth MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your FluidSynth MCP Server environment.

WHY IT NEEDS A POLICY

Why solo_track needs a policy

Soloing a track is a reversible modification to the project's playback state — it mutes other tracks temporarily. This is a non-destructive, reversible change to project settings, classifying it as Write. Blast radius is low as it only affects local project audio state.

From the tool's definition Solo a track in the specified project

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

solo_track Rate-limited

solo_track stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "solo_track": {
      "limits": [
        {
          "counter": "solo_track_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about solo_track

What does the solo_track tool do? +

Solo a track in the specified project. It is categorised as a Write tool in the FluidSynth MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on solo_track? +

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

What risk level is solo_track? +

solo_track is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit solo_track? +

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

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

solo_track is provided by the FluidSynth MCP Server MCP server (kimjune01/synth-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.