# browser_evaluate

Execute JavaScript in browser page

Agent View of the PolicyLayer registry record for `browser_evaluate`. HTML page: https://policylayer.com/tools/alexgladkov-claude-in-mobile/browser-evaluate

## Facts

- Tool: `browser_evaluate`
- Server: Claude Mobile (`alexgladkov/claude-in-mobile`) — https://policylayer.com/tools/alexgladkov-claude-in-mobile.md
- Homepage: https://github.com/AlexGladkov/claude-in-mobile
- 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_evaluate",
    "arguments": {}
  }
}
```

## Why browser_evaluate is rated High

Executing arbitrary JavaScript in a browser context allows the AI agent to inspect/modify the DOM, access local storage, trigger network requests, redirect pages, or exfiltrate data. The blast radius is high because JavaScript can perform actions across the web page and potentially interact with external services.

From the tool's own definition: "Tool explicitly stated to 'Execute JavaScript in browser page' — this directly runs code with effects determined by the script content."

## Use case

AI agents invoke browser_evaluate to trigger actions in Claude Mobile. 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 Claude Mobile:

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

## Other tools on Claude Mobile (197)

- `browser_clear_session` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/browser-clear-session.md
- `debug_remove_break` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/debug-remove-break.md
- `network_proxy` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/network-proxy.md
- `permission_reset` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/permission-reset.md
- `permission_revoke` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/permission-revoke.md
- `recorder` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/recorder.md
- `recorder_delete` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/recorder-delete.md
- `recorder_remove_step` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/recorder-remove-step.md
- `repl_kill` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/repl-kill.md
- `rustore_discard` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/rustore-discard.md
- `sensor_battery` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/sensor-battery.md
- `store_discard` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/store-discard.md
- `sync_destroy` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/sync-destroy.md
- `system_clear_logs` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/system-clear-logs.md
- `visual` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/visual.md
- `visual_delete` — Destructive — https://policylayer.com/tools/alexgladkov-claude-in-mobile/visual-delete.md
- `app` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/app.md
- `app_install` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/app-install.md
- `app_launch` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/app-launch.md
- `app_restart` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/app-restart.md
- `app_stop` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/app-stop.md
- `appstore_build` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/appstore-build.md
- `appstore_submit` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/appstore-submit.md
- `appstore_upload` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/appstore-upload.md
- `autopilot` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/autopilot.md
- `autopilot_explore` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/autopilot-explore.md
- `autopilot_heal` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/autopilot-heal.md
- `browser` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/browser.md
- `browser_click` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/browser-click.md
- `browser_close` — Execute — https://policylayer.com/tools/alexgladkov-claude-in-mobile/browser-close.md
- …and 167 more: https://policylayer.com/tools/alexgladkov-claude-in-mobile.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`

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Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=alexgladkov-claude-in-mobile · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/alexgladkov-claude-in-mobile