toggle_mute · Obs MCP: Risk & Policy

WHAT IT DOES

What toggle_mute does on Obs

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

WHY IT NEEDS A POLICY

Why toggle_mute needs a policy

This tool modifies audio input settings in a live streaming/recording application (OBS Studio). While the change is reversible (toggling mute on/off), it affects the output of a broadcast or recording session, potentially causing unintended audio changes during active streams or recordings.

From the tool's definition Tool toggles (modifies) mute state on audio inputs in OBS Studio, changing audio configuration reversibly. Description states 'Toggle mute on an audio input' — a state modification operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

toggle_mute Rate-limited

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

FAQ

Questions about toggle_mute

What does the toggle_mute tool do? +

Toggle mute on an audio input. It is categorised as a Write tool in the Obs MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on toggle_mute? +

Register the Obs 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 Obs. Nothing to install.

What risk level is toggle_mute? +

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

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 Obs MCP server (larscangit/obs-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.