navigate_to_url · MCP Selenium WebDriver MCP: Risk & Policy

WHAT IT DOES

What navigate_to_url does on MCP Selenium WebDriver

AI agents invoke navigate_to_url to trigger actions in MCP Selenium WebDriver. 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 navigate_to_url needs a policy

Navigation to arbitrary URLs is an Execute action because it triggers external operations (HTTP requests, JavaScript execution, page loads) whose effects depend on the URL argument provided by an AI agent. While not immediately Destructive or Financial, it has high blast radius: malicious URLs could perform phishing, credential theft, malware delivery, or reconnaissance.

From the tool's definition Tool navigates to a URL ('Naviga a una URL específica'), which can trigger arbitrary web requests and execute code in a browser context.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

navigate_to_url Rate-limited

navigate_to_url 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": {
    "navigate_to_url": {
      "limits": [
        {
          "counter": "navigate_to_url_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 Selenium WebDriver, so you can run agents against it safely.

FAQ

Questions about navigate_to_url

What does the navigate_to_url tool do? +

Navega a una URL específica. It is categorised as a Execute tool in the MCP Selenium WebDriver MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on navigate_to_url? +

Register the MCP Selenium WebDriver MCP server in PolicyLayer and add a rule for navigate_to_url: 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 Selenium WebDriver. Nothing to install.

What risk level is navigate_to_url? +

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

Can I rate-limit navigate_to_url? +

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

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

navigate_to_url is provided by the MCP Selenium WebDriver MCP server (nixon-suarez/mcp-selenium-webdriver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.