iac_mcp_activate_app · Iac MCP: Risk & Policy

WHAT IT DOES

What iac_mcp_activate_app does on Iac

AI agents invoke iac_mcp_activate_app to trigger actions in Iac. 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 iac_mcp_activate_app needs a policy

Activating and bringing an application to the foreground is an external operation that triggers a system-level action (changing focus/frontmost app). It goes beyond merely reading data, and while not destructive or financial, it executes an OS-level command that affects application state and user environment.

From the tool's definition Bring a macOS application to the front (activate it). The app will become the frontmost application.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

iac_mcp_activate_app Rate-limited

iac_mcp_activate_app 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": {
    "iac_mcp_activate_app": {
      "limits": [
        {
          "counter": "iac_mcp_activate_app_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 Iac, so you can run agents against it safely.

FAQ

Questions about iac_mcp_activate_app

What does the iac_mcp_activate_app tool do? +

Bring a macOS application to the front (activate it). Usage: Pass the application name. The app will become the frontmost application. Examples: - app:. It is categorised as a Execute tool in the Iac MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on iac_mcp_activate_app? +

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

What risk level is iac_mcp_activate_app? +

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

Can I rate-limit iac_mcp_activate_app? +

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

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

iac_mcp_activate_app is provided by the Iac MCP server (jsavin/iac-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.