toggle_loop · MCP Media Server MCP: Risk & Policy

WHAT IT DOES

What toggle_loop does on MCP Media Server

AI agents invoke toggle_loop to trigger actions in MCP Media 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 toggle_loop needs a policy

This tool executes a control command on a media player to change playback behavior. While the action is reversible and affects only the current playback session, it goes beyond passive data retrieval (Read) as it actively triggers an operation with observable side effects on the media player state. It is not Write (no data creation/modification), Destructive, Financial, or Other.

From the tool's definition The tool 'toggle_loop' affects playback state by toggling a feature on the current video. The description states it toggles 'loop mode on/off', which is an action that modifies the behavior of an active media player operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

toggle_loop Rate-limited

toggle_loop 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_loop": {
      "limits": [
        {
          "counter": "toggle_loop_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 MCP Media Server, so you can run agents against it safely.

FAQ

Questions about toggle_loop

What does the toggle_loop tool do? +

Toggle loop mode on/off for the current video. It is categorised as a Execute tool in the MCP Media 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 toggle_loop? +

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

What risk level is toggle_loop? +

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

Can I rate-limit toggle_loop? +

Yes. Add a rate_limit block to the toggle_loop 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_loop completely? +

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

toggle_loop is provided by the MCP Media Server MCP server (neal3000/mcp_media_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.