# browser_navigate

Navigate to a URL and capture a screenshot

Agent View of the PolicyLayer registry record for `browser_navigate`. HTML page: https://policylayer.com/tools/0x-hewm-percepta-mcp/browser-navigate

## Facts

- Tool: `browser_navigate`
- Server: Percepta MCP Server (`0x-hewm/percepta-mcp`) — https://policylayer.com/tools/0x-hewm-percepta-mcp.md
- Homepage: https://github.com/0x-hewm/percepta-mcp
- Risk category: Execute (High risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "browser_navigate",
    "arguments": {}
  }
}
```

## 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 own 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."

## Use case

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.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Percepta MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "browser_navigate": {
      "limits": [
        {
          "counter": "browser_navigate_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Percepta MCP Server (21)

- `ai_analyze` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/ai-analyze.md
- `ai_chat` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/ai-chat.md
- `ai_generate` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/ai-generate.md
- `browser_click` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/browser-click.md
- `browser_fill` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/browser-fill.md
- `browser_wait_for_element` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/browser-wait-for-element.md
- `execute_test_case` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/execute-test-case.md
- `generate_and_execute_test` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/generate-and-execute-test.md
- `generate_test_case` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/generate-test-case.md
- `monitor_and_analyze_page` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/monitor-and-analyze-page.md
- `start_devtools_monitoring` — Execute — https://policylayer.com/tools/0x-hewm-percepta-mcp/start-devtools-monitoring.md
- `analyze_devtools_anomalies` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/analyze-devtools-anomalies.md
- `analyze_image` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/analyze-image.md
- `browser_extract_text` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/browser-extract-text.md
- `browser_screenshot` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/browser-screenshot.md
- `collect_devtools_data` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/collect-devtools-data.md
- `compare_images` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/compare-images.md
- `extract_structured_data` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/extract-structured-data.md
- `extract_text_from_image` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/extract-text-from-image.md
- `scrape_website` — Read — https://policylayer.com/tools/0x-hewm-percepta-mcp/scrape-website.md
- `generate_devtools_report` — Write — https://policylayer.com/tools/0x-hewm-percepta-mcp/generate-devtools-report.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=0x-hewm-percepta-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/0x-hewm-percepta-mcp