play_pause · Roon MCP: Risk & Policy

WHAT IT DOES

What play_pause does on Roon

AI agents invoke play_pause to trigger actions in Roon. 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 play_pause needs a policy

This tool triggers an external operation (toggling playback state) on a Roon audio zone. It executes a command that changes the state of a physical/remote device. No data is created, modified, or destroyed, but it triggers an external action, making Execute the appropriate category. Severity is low as misuse only affects music playback.

From the tool's definition Toggle play/pause on a Roon zone

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

play_pause Rate-limited

play_pause 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": {
    "play_pause": {
      "limits": [
        {
          "counter": "play_pause_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 Roon, so you can run agents against it safely.

FAQ

Questions about play_pause

What does the play_pause tool do? +

Toggle play/pause on a Roon zone. It is categorised as a Execute tool in the Roon 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_pause? +

Register the Roon MCP server in PolicyLayer and add a rule for play_pause: 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 Roon. Nothing to install.

What risk level is play_pause? +

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

Can I rate-limit play_pause? +

Yes. Add a rate_limit block to the play_pause 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_pause completely? +

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

play_pause is provided by the Roon MCP server (txagscott/roon-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.