wmi_query · Windows Operations MCP: Risk & Policy

WHAT IT DOES

What wmi_query does on Windows Operations MCP

AI agents invoke wmi_query to trigger actions in Windows Operations 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 wmi_query needs a policy

WMI (Windows Management Instrumentation) queries can retrieve system data but WMI also supports method invocations that execute arbitrary operations (e.g., process creation, service control, remote execution). On a server explicitly designed for Windows system management and automation, a WMI query tool likely supports method calls beyond read-only queries.

From the tool's definition Tool name 'wmi_query' on a server that includes PowerShell/CMD execution and system monitoring; description is empty.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

wmi_query Rate-limited

wmi_query 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": {
    "wmi_query": {
      "limits": [
        {
          "counter": "wmi_query_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 Operations MCP, so you can run agents against it safely.

FAQ

Questions about wmi_query

What does the wmi_query tool do? +

wmi_query. It is categorised as a Execute tool in the Windows Operations 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 wmi_query? +

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

What risk level is wmi_query? +

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

Can I rate-limit wmi_query? +

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

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

wmi_query is provided by the Windows Operations MCP server (sandraschi/windows-operations-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.