Switch-Tool · Windows- MCP: Risk & Policy

WHAT IT DOES

What Switch-Tool does on Windows-MCP

AI agents invoke Switch-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 Switch-Tool needs a policy

This tool triggers an OS-level action that changes the focused application window, which is an external operation affecting the desktop environment. It's not a read (no data retrieval), not destructive, but it does execute a UI automation action that changes system state. Misuse could allow an agent to switch context to sensitive applications like banking or password managers, enabling further exploitation.

From the tool's definition Switch to a specific application window

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

Switch-Tool Rate-limited

Switch-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": {
    "Switch-Tool": {
      "limits": [
        {
          "counter": "switch-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 Switch-Tool

What does the Switch-Tool tool do? +

Switch to 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 Switch-Tool? +

Register the Windows- MCP server in PolicyLayer and add a rule for Switch-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 Switch-Tool? +

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

Can I rate-limit Switch-Tool? +

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

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

Switch-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.