Resize-Tool · Windows- MCP: Risk & Policy

WHAT IT DOES

What Resize-Tool does on Windows-MCP

AI agents invoke Resize-Tool to trigger actions in Windows-MCP. 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-Tool needs a policy

Resizing an application window is an action that interacts with the Windows OS UI layer, making it an Execute-category operation (UI automation/application control). It has minimal blast radius as it only changes window dimensions and does not read, write, or destroy data, nor does it have financial implications. Confidence is slightly reduced because the description is truncated and incomplete.

From the tool's definition 'Resize a specific application window' — triggers an external operation affecting the Windows UI environment

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

Resize-Tool Rate-limited

Resize-Tool 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-Tool": {
      "limits": [
        {
          "counter": "resize-tool_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, so you can run agents against it safely.

FAQ

Questions about Resize-Tool

What does the Resize-Tool tool do? +

Resize a specific application window (e.g.,. It is categorised as a Execute tool in the Windows-MCP 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-Tool? +

Register the Windows- MCP server in PolicyLayer and add a rule for Resize-Tool: 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. Nothing to install.

What risk level is Resize-Tool? +

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

Can I rate-limit Resize-Tool? +

Yes. Add a rate_limit block to the Resize-Tool 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-Tool completely? +

Set action: deny in the PolicyLayer policy for Resize-Tool. 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-Tool? +

Resize-Tool is provided by the Windows- MCP server (stepbystep-1/winows-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.