browser_navigate

Navigate to a URL and capture a screenshot

SERVERPercepta MCP Server SOURCE0x-hewm/percepta-mcp

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/0x-hewm-percepta-mcp/browser-navigate.md

WHAT IT DOES

What browser_navigate does on Percepta MCP Server

AI agents invoke browser_navigate to trigger actions in Percepta 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.

RISK

Why browser_navigate is rated High

This falls into Execute rather than Read because navigating to a URL is an active browser operation that can trigger arbitrary code execution on target servers, execute JavaScript, set cookies, initiate file downloads, and cause other side effects beyond passive data retrieval. The tool's effect depends entirely on the URL argument provided by an AI agent.

From the tool's definition Tool performs 'Navigate to a URL and capture a screenshot' — an automated browser action that fetches external content and triggers network requests with side effects determined by the URL argument.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs browser_navigate safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Percepta MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For browser_navigate, this is the rule to start with:

browser_navigate Rate-limited

browser_navigate 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_navigate": {
      "limits": [
        {
          "counter": "browser_navigate_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Percepta MCP Server, apply this rule, and every browser_navigate call is checked against it from then on.

FAQ

Questions about browser_navigate

What does the browser_navigate tool do? +

Navigate to a URL and capture a screenshot. It is categorised as a Execute tool in the Percepta 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 browser_navigate? +

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

What risk level is browser_navigate? +

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

Can I rate-limit browser_navigate? +

Yes. Add a rate_limit block to the browser_navigate 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_navigate completely? +

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

browser_navigate is provided by the Percepta MCP Server MCP server (0x-hewm/percepta-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

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