grant · Windows Operations MCP: Risk & Policy

WHAT IT DOES

What grant does on Windows Operations MCP

AI agents use grant to create or update resources in Windows Operations MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Windows Operations MCP environment.

WHY IT NEEDS A POLICY

Why grant needs a policy

The 'grant' tool most likely modifies permissions or access control lists (ACLs) on Windows resources, which constitutes a reversible Write operation. However, confidence is reduced because the description is empty, preventing confirmation of exact behavior.

From the tool's definition Tool named 'grant' in a Windows Operations MCP server offering 'comprehensive Windows system management' including user management (sibling tool 'add_user'). The name 'grant' in Windows context typically refers to granting permissions or access rights.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

grant Rate-limited

grant stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "grant": {
      "limits": [
        {
          "counter": "grant_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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 grant

What does the grant tool do? +

grant. It is categorised as a Write tool in the Windows Operations MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on grant? +

Register the Windows Operations MCP server in PolicyLayer and add a rule for grant: 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 grant? +

grant is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit grant? +

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

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

grant 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.