browser_pdf_save · MCP Macaco Playwright MCP: Risk & Policy

WHAT IT DOES

What browser_pdf_save does on MCP Macaco Playwright

AI agents use browser_pdf_save to create or update resources in MCP Macaco Playwright — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Macaco Playwright environment.

WHY IT NEEDS A POLICY

Why browser_pdf_save needs a policy

This tool creates/writes a new file (PDF output) without destructive capabilities—the operation is reversible (the PDF can be deleted). It does not execute arbitrary code, delete existing data, or move money. While it could be abused to exfiltrate visual data from web pages, the actual operation is a straightforward write action.

From the tool's definition Tool name 'browser_pdf_save' and description 'Save page as PDF' indicate creation of a new file artifact (PDF document) on the local filesystem.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

browser_pdf_save Rate-limited

browser_pdf_save stays usable, but capped — an agent stuck in a loop can't make hundreds of changes 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_pdf_save": {
      "limits": [
        {
          "counter": "browser_pdf_save_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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 Macaco Playwright, so you can run agents against it safely.

FAQ

Questions about browser_pdf_save

What does the browser_pdf_save tool do? +

Save page as PDF. It is categorised as a Write tool in the MCP Macaco Playwright MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on browser_pdf_save? +

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

What risk level is browser_pdf_save? +

browser_pdf_save is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit browser_pdf_save? +

Yes. Add a rate_limit block to the browser_pdf_save 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_pdf_save completely? +

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

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