browser_handle_dialog · MCP Macaco Playwright MCP

WHAT IT DOES

What browser_handle_dialog does on MCP Macaco Playwright

AI agents invoke browser_handle_dialog to trigger actions in MCP Macaco Playwright. 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_handle_dialog needs a policy

This tool interacts with live browser dialog interactions triggered by JavaScript execution. Accepting or dismissing dialogs can trigger downstream actions in web applications (e.g., confirming a destructive action, submitting a prompt response), making it an Execute-level operation. Misuse could lead to unintended confirmations of critical operations on web pages.

From the tool's definition Handles native browser dialogs that appear from JavaScript alert(), confirm(), or prompt() calls. Can accept/dismiss and provide text input for prompts.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

browser_handle_dialog Rate-limited

browser_handle_dialog 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_handle_dialog": {
      "limits": [
        {
          "counter": "browser_handle_dialog_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 Macaco Playwright, so you can run agents against it safely.

FAQ

Questions about browser_handle_dialog

What does the browser_handle_dialog tool do? +

Handles native browser dialogs that appear from JavaScript alert(), confirm(), or prompt() calls. Can accept/dismiss and provide text input for prompts. It is categorised as a Execute tool in the MCP Macaco Playwright 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_handle_dialog? +

Register the MCP Macaco Playwright MCP server in PolicyLayer and add a rule for browser_handle_dialog: 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 Macaco Playwright. Nothing to install.

What risk level is browser_handle_dialog? +

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

Can I rate-limit browser_handle_dialog? +

Yes. Add a rate_limit block to the browser_handle_dialog 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_handle_dialog completely? +

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

browser_handle_dialog is provided by the MCP Macaco Playwright MCP server (macacoai/mcp-playwright). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.