resize_window · Windows MCP Server MCP: Risk & Policy

WHAT IT DOES

What resize_window does on Windows MCP Server

AI agents invoke resize_window to trigger actions in Windows MCP Server. 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 resize_window needs a policy

This tool performs system-level window management actions (resizing and moving windows) through the Windows UI Automation layer. It executes operations with side effects on the running environment but does not read data, create/modify persistent data, delete anything, or involve finances. Execute is the most appropriate category as it triggers external operations on the OS UI.

From the tool's definition 'Resize and/or move a window' — triggers external UI operations (window management) on the Windows system

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

resize_window Rate-limited

resize_window 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": {
    "resize_window": {
      "limits": [
        {
          "counter": "resize_window_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 Windows MCP Server, so you can run agents against it safely.

FAQ

Questions about resize_window

What does the resize_window tool do? +

Resize and/or move a window. It is categorised as a Execute tool in the Windows MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on resize_window? +

Register the Windows MCP Server MCP server in PolicyLayer and add a rule for resize_window: 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 Windows MCP Server. Nothing to install.

What risk level is resize_window? +

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

Can I rate-limit resize_window? +

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

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

resize_window is provided by the Windows MCP Server MCP server (romeo2badboy-rgb/windows-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.