browser_stop_video · Playwright MCP: Risk & Policy

WHAT IT DOES

What browser_stop_video does on Playwright MCP

AI agents invoke browser_stop_video to trigger actions in Playwright MCP. 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 browser_stop_video needs a policy

This tool executes a command that affects browser state and media playback. While not destructive (video can be restarted) and not write-level (doesn't persist data changes), it actively controls browser behavior, placing it in Execute. Confidence is moderate (0.75) because the description is empty, reducing certainty, but context from sibling tools and the action-oriented name support Execute classification.

From the tool's definition Tool name 'browser_stop_video' suggests control of media playback within a browser context. The Playwright MCP server description indicates browser automation with action capabilities (sibling tools include browser_click, browser_drag, browser_evaluate).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

browser_stop_video Rate-limited

browser_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": {
    "browser_stop_video": {
      "limits": [
        {
          "counter": "browser_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 Playwright MCP, so you can run agents against it safely.

FAQ

Questions about browser_stop_video

What does the browser_stop_video tool do? +

browser_stop_video. It is categorised as a Execute tool in the Playwright MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on browser_stop_video? +

Register the Playwright MCP server in PolicyLayer and add a rule for browser_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 Playwright MCP. Nothing to install.

What risk level is browser_stop_video? +

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

Can I rate-limit browser_stop_video? +

Yes. Add a rate_limit block to the browser_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 browser_stop_video completely? +

Set action: deny in the PolicyLayer policy for browser_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 browser_stop_video? +

browser_stop_video is provided by the Playwright MCP server (roshan571/playwright-mcp2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.