window_focus · It2 MCP: Risk & Policy

WHAT IT DOES

What window_focus does on It2mcp

AI agents invoke window_focus to trigger actions in It2mcp. 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 window_focus needs a policy

Focusing/activating a window triggers an external UI operation in iTerm2, changing application state beyond simple data retrieval or modification. It controls the terminal application's window management, which is an external operation. While not destructive or financial, it executes an action against a running application, fitting the Execute category.

From the tool's definition Focus (activate) a specific iTerm2 window

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

window_focus Rate-limited

window_focus 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": {
    "window_focus": {
      "limits": [
        {
          "counter": "window_focus_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 It2mcp, so you can run agents against it safely.

FAQ

Questions about window_focus

What does the window_focus tool do? +

Focus (activate) a specific iTerm2 window. It is categorised as a Execute tool in the It2mcp MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on window_focus? +

Register the It2 MCP server in PolicyLayer and add a rule for window_focus: 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 It2mcp. Nothing to install.

What risk level is window_focus? +

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

Can I rate-limit window_focus? +

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

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

window_focus is provided by the It2 MCP server (urjitbhatia/it2mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.