stop_video · Social Video MCP: Risk & Policy

WHAT IT DOES

What stop_video does on Social Video

AI agents invoke stop_video to trigger actions in Social Video. 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 stop_video needs a policy

This tool executes a command against an external system (mpv player) to change its state. While the action itself is reversible and low-impact (simply stopping playback and closing a window), it represents active control and execution of operations rather than passive data retrieval.

From the tool's definition Tool performs 'stop the currently playing video and close the mpv window' — an action that triggers external operations (mpv player control) whose effects depend on the current state of the application.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

stop_video Rate-limited

stop_video 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": {
    "stop_video": {
      "limits": [
        {
          "counter": "stop_video_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 Social Video, so you can run agents against it safely.

FAQ

Questions about stop_video

What does the stop_video tool do? +

Stop the currently playing video and close the mpv window. It is categorised as a Execute tool in the Social Video MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on stop_video? +

Register the Social Video MCP server in PolicyLayer and add a rule for stop_video: 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 Social Video. Nothing to install.

What risk level is stop_video? +

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

Can I rate-limit stop_video? +

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

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

stop_video is provided by the Social Video MCP server (ronantakizawa/social-video-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.