desktop_window_resize · MCP Desktop Tools MCP: Risk & Policy

WHAT IT DOES

What desktop_window_resize does on MCP Desktop Tools

AI agents invoke desktop_window_resize to trigger actions in MCP Desktop Tools. 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 desktop_window_resize needs a policy

This tool performs desktop automation actions (resizing and moving windows) that constitute external operations on the system. While not destructive or data-modifying, it triggers real UI/window management operations. The blast radius is low since it only affects window positioning/sizing and is easily reversible, but it fits Execute as it interacts with the operating system's window management.

From the tool's definition Resize and/or move a window by title

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

desktop_window_resize Rate-limited

desktop_window_resize 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": {
    "desktop_window_resize": {
      "limits": [
        {
          "counter": "desktop_window_resize_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 MCP Desktop Tools, so you can run agents against it safely.

FAQ

Questions about desktop_window_resize

What does the desktop_window_resize tool do? +

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

How do I enforce a policy on desktop_window_resize? +

Register the MCP Desktop Tools MCP server in PolicyLayer and add a rule for desktop_window_resize: 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 MCP Desktop Tools. Nothing to install.

What risk level is desktop_window_resize? +

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

Can I rate-limit desktop_window_resize? +

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

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

desktop_window_resize is provided by the MCP Desktop Tools MCP server (k1ta141k/mcp-desktop-tools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.