browser_start_video

A execute tool on the Playwright MCP server.

SERVERPlaywright MCP SOURCEalialobidm/playwright-mcp

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/alialobidm-playwright-mcp/browser-start-video.md

WHAT IT DOES

What browser_start_video does on Playwright MCP

AI agents invoke browser_start_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.

RISK

Why browser_start_video is rated High

Starting video capture is an actionable operation that initiates a subprocess or external process whose effects depend on runtime arguments (output file location, codec, duration, etc.). While not destructive or financial, it executes a command with side effects that persist beyond the tool call.

From the tool's definition Tool name 'browser_start_video' on a browser automation server (Playwright MCP) indicates it initiates video recording/capture of browser sessions.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs browser_start_video safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Playwright MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For browser_start_video, this is the rule to start with:

browser_start_video Rate-limited

browser_start_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_start_video": {
      "limits": [
        {
          "counter": "browser_start_video_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Playwright MCP, apply this rule, and every browser_start_video call is checked against it from then on.

FAQ

Questions about browser_start_video

What does the browser_start_video tool do? +

browser_start_video is a execute tool on the Playwright MCP server. 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_start_video? +

Register the Playwright MCP server in PolicyLayer and add a rule for browser_start_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_start_video? +

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

Can I rate-limit browser_start_video? +

Yes. Add a rate_limit block to the browser_start_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_start_video completely? +

Set action: deny in the PolicyLayer policy for browser_start_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_start_video? +

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

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