network_unroute · MCP Playwright Server MCP: Risk & Policy

WHAT IT DOES

What network_unroute does on MCP Playwright Server

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

This tool modifies the browser's network routing configuration by removing route intercepts set up in Playwright. It triggers an external operation (changing how network requests are handled during browser automation).

From the tool's definition Remove previously set network routes. If no pattern specified, removes all routes.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

network_unroute Rate-limited

network_unroute 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": {
    "network_unroute": {
      "limits": [
        {
          "counter": "network_unroute_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 MCP Playwright Server, so you can run agents against it safely.

FAQ

Questions about network_unroute

What does the network_unroute tool do? +

Remove previously set network routes. If no pattern specified, removes all routes. It is categorised as a Execute tool in the MCP Playwright 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 network_unroute? +

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

What risk level is network_unroute? +

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

Can I rate-limit network_unroute? +

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

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

network_unroute is provided by the MCP Playwright Server MCP server (j0hanz/playwright-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.