window_fullscreen · It2 MCP: Risk & Policy

WHAT IT DOES

What window_fullscreen does on It2mcp

AI agents use window_fullscreen to create or update resources in It2mcp — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your It2mcp environment.

WHY IT NEEDS A POLICY

Why window_fullscreen needs a policy

This tool modifies the display state of a window (toggling fullscreen on/off), which is a reversible UI change. It does not execute commands, delete data, or involve financial operations. Severity is low as it only affects window presentation.

From the tool's definition Set fullscreen state for an iTerm2 window

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

window_fullscreen Rate-limited

window_fullscreen stays usable, but capped — an agent stuck in a loop can't make hundreds of changes 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_fullscreen": {
      "limits": [
        {
          "counter": "window_fullscreen_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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_fullscreen

What does the window_fullscreen tool do? +

Set fullscreen state for an iTerm2 window. It is categorised as a Write tool in the It2mcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on window_fullscreen? +

Register the It2 MCP server in PolicyLayer and add a rule for window_fullscreen: 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_fullscreen? +

window_fullscreen is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit window_fullscreen? +

Yes. Add a rate_limit block to the window_fullscreen 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_fullscreen completely? +

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

window_fullscreen 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.