double_click · Mac MCP: Risk & Policy

WHAT IT DOES

What double_click does on Mac

AI agents invoke double_click to trigger actions in Mac. 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 double_click needs a policy

Double-clicking at specified coordinates is a UI interaction/browser action that triggers external operations whose effects depend on arguments. It can open files, execute programs, activate UI elements, or trigger any action a double-click would perform in macOS. The blast radius is high because a misplaced double-click could open, launch, or interact with sensitive applications or files unpredictably.

From the tool's definition Performs a double-click at specified coordinates

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

double_click Rate-limited

double_click 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": {
    "double_click": {
      "limits": [
        {
          "counter": "double_click_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 Mac, so you can run agents against it safely.

FAQ

Questions about double_click

What does the double_click tool do? +

Performs a double-click at specified coordinates. It is categorised as a Execute tool in the Mac MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on double_click? +

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

What risk level is double_click? +

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

Can I rate-limit double_click? +

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

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

double_click is provided by the Mac MCP server (laststance/mac-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.