playwright_capture_screenshots · UI/UX MCP Server MCP

WHAT IT DOES

What playwright_capture_screenshots does on UI/UX MCP Server

AI agents invoke playwright_capture_screenshots to trigger actions in UI/UX MCP 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 playwright_capture_screenshots needs a policy

This tool triggers external browser automation (Playwright) to navigate pages and capture screenshots. It executes browser processes and performs actions in external environments, making it an Execute category tool. Misuse could lead to unintended browser automation, resource exhaustion, or capture of sensitive screen content.

From the tool's definition 'Capture screenshots across browsers and viewports' implies launching browser instances and executing automated browser actions via Playwright

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

playwright_capture_screenshots Rate-limited

playwright_capture_screenshots 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": {
    "playwright_capture_screenshots": {
      "limits": [
        {
          "counter": "playwright_capture_screenshots_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 UI/UX MCP Server, so you can run agents against it safely.

FAQ

Questions about playwright_capture_screenshots

What does the playwright_capture_screenshots tool do? +

Capture screenshots across browsers and viewports. It is categorised as a Execute tool in the UI/UX MCP 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 playwright_capture_screenshots? +

Register the UI/UX MCP Server MCP server in PolicyLayer and add a rule for playwright_capture_screenshots: 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 UI/UX MCP Server. Nothing to install.

What risk level is playwright_capture_screenshots? +

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

Can I rate-limit playwright_capture_screenshots? +

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

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

playwright_capture_screenshots is provided by the UI/UX MCP Server MCP server (willem4130/ui-ux-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.