dismiss_sheet · MacWright MCP: Risk & Policy

WHAT IT DOES

What dismiss_sheet does on MacWright

AI agents invoke dismiss_sheet to trigger actions in MacWright. 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 dismiss_sheet needs a policy

This tool triggers an external UI action (dismissing a sheet/dialog) in a macOS application. It performs an interaction with the operating system's GUI, which constitutes executing an action with side effects that depend on the current state of the application.

From the tool's definition Detect and dismiss a sheet or dialog in a native macOS app

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

dismiss_sheet Rate-limited

dismiss_sheet 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": {
    "dismiss_sheet": {
      "limits": [
        {
          "counter": "dismiss_sheet_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 MacWright, so you can run agents against it safely.

FAQ

Questions about dismiss_sheet

What does the dismiss_sheet tool do? +

Detect and dismiss a sheet or dialog in a native macOS app (e.g. Safari. It is categorised as a Execute tool in the MacWright MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on dismiss_sheet? +

Register the MacWright MCP server in PolicyLayer and add a rule for dismiss_sheet: 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 MacWright. Nothing to install.

What risk level is dismiss_sheet? +

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

Can I rate-limit dismiss_sheet? +

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

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

dismiss_sheet is provided by the MacWright MCP server (ruchit-p/macwright). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.