toggle_mute · macOS MCP Servers MCP: Risk & Policy

WHAT IT DOES

What toggle_mute does on macOS MCP Servers

AI agents invoke toggle_mute to trigger actions in macOS MCP Servers. 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 toggle_mute needs a policy

This tool triggers an external operation on an active FaceTime call by toggling the mute state. It modifies the state of a live call (audio on/off), which is an external operation with real-time effects. It's not purely a data read/write, nor destructive or financial — it falls under Execute as it controls a running external application/process.

From the tool's definition Toggle mute/unmute for the current FaceTime call

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

toggle_mute Rate-limited

toggle_mute 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": {
    "toggle_mute": {
      "limits": [
        {
          "counter": "toggle_mute_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 macOS MCP Servers, so you can run agents against it safely.

FAQ

Questions about toggle_mute

What does the toggle_mute tool do? +

Toggle mute/unmute for the current FaceTime call. It is categorised as a Execute tool in the macOS MCP Servers MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on toggle_mute? +

Register the macOS MCP Servers MCP server in PolicyLayer and add a rule for toggle_mute: 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 macOS MCP Servers. Nothing to install.

What risk level is toggle_mute? +

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

Can I rate-limit toggle_mute? +

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

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

toggle_mute is provided by the macOS MCP Servers MCP server (tdisawas0github/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.