format_json · Windows Operations MCP: Risk & Policy

WHAT IT DOES

What format_json does on Windows Operations MCP

AI agents use format_json 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 format_json needs a policy

Format operations typically transform data reversibly. Without a description, confidence is moderate. Categorized as Write rather than Read because formatting output is often persisted to files/systems. Severity is medium due to potential for data corruption if formatting logic has bugs, but the operation is generally reversible.

From the tool's definition Tool name 'format_json' suggests data formatting/transformation. No description provided. In context of a Windows Operations MCP server offering file operations and PowerShell/CMD execution, this tool likely reads JSON input and outputs formatted JSON…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

format_json Rate-limited

format_json 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": {
    "format_json": {
      "limits": [
        {
          "counter": "format_json_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 format_json

What does the format_json tool do? +

format_json. 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 format_json? +

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

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

Can I rate-limit format_json? +

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

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

format_json 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.