browser_wait_for_navigation · MCProxy MCP: Risk & Policy

WHAT IT DOES

What browser_wait_for_navigation does on MCProxy

AI agents invoke browser_wait_for_navigation to trigger actions in MCProxy. 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_wait_for_navigation needs a policy

This tool triggers and monitors external browser operations whose effects depend on the context of ongoing automation sequences. While not directly destructive or financial, it executes browser state changes and can be chained with other browser automation tools to perform complex web interactions, social engineering, credential harvesting, or unauthorized data access.

From the tool's definition The tool 'browser_wait_for_navigation' controls browser behavior by waiting for and monitoring page navigation events.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

browser_wait_for_navigation Rate-limited

browser_wait_for_navigation 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_wait_for_navigation": {
      "limits": [
        {
          "counter": "browser_wait_for_navigation_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 MCProxy, so you can run agents against it safely.

FAQ

Questions about browser_wait_for_navigation

What does the browser_wait_for_navigation tool do? +

Wait for page navigation to complete. It is categorised as a Execute tool in the MCProxy 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_wait_for_navigation? +

Register the MCProxy MCP server in PolicyLayer and add a rule for browser_wait_for_navigation: 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 MCProxy. Nothing to install.

What risk level is browser_wait_for_navigation? +

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

Can I rate-limit browser_wait_for_navigation? +

Yes. Add a rate_limit block to the browser_wait_for_navigation 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_wait_for_navigation completely? +

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

browser_wait_for_navigation is provided by the MCProxy MCP server (saladtechnologies/mcproxy). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.