play · Windows Computer Use MCP: Risk & Policy

WHAT IT DOES

What play does on Windows Computer Use

AI agents invoke play to trigger actions in Windows Computer Use. 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 play needs a policy

The server is designed for full desktop control including input injection and play-testing. The 'play' tool likely triggers automated playback or execution of recorded actions/scripts on the desktop. Given the server's capability to perform low-level input injection and control the OS, misuse could have significant impact. However, the empty description lowers confidence considerably.

From the tool's definition Tool name 'play' on a server described as enabling 'full control of a Windows desktop with native screen capture, low-level input injection, game-grade input, and play-testing capabilities.' Sibling tools include act, process, record, screenshot, system,…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

play Rate-limited

play 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": {
    "play": {
      "limits": [
        {
          "counter": "play_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 Computer Use, so you can run agents against it safely.

FAQ

Questions about play

What does the play tool do? +

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

How do I enforce a policy on play? +

Register the Windows Computer Use MCP server in PolicyLayer and add a rule for play: 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 Computer Use. Nothing to install.

What risk level is play? +

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

Can I rate-limit play? +

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

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

play is provided by the Windows Computer Use MCP server (sshh12/windows-computer-use-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.