maid_validate · Maid Runner MCP: Risk & Policy

WHAT IT DOES

What maid_validate does on Maid Runner

AI agents invoke maid_validate to trigger actions in Maid Runner. 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 maid_validate needs a policy

The tool name suggests validation, which typically involves running checks or tests against code/manifests. Given the server context (MAID Runner with validate, snapshot, test tools for AI development workflows), validation likely executes some form of checking or linting process. However, with an empty description, confidence is low.

From the tool's definition Tool name 'maid_validate' and server description mentions 'validate' as one of the core tools; description is empty or uninformative.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

maid_validate Rate-limited

maid_validate 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": {
    "maid_validate": {
      "limits": [
        {
          "counter": "maid_validate_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 Maid Runner, so you can run agents against it safely.

FAQ

Questions about maid_validate

What does the maid_validate tool do? +

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

How do I enforce a policy on maid_validate? +

Register the Maid Runner MCP server in PolicyLayer and add a rule for maid_validate: 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 Maid Runner. Nothing to install.

What risk level is maid_validate? +

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

Can I rate-limit maid_validate? +

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

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

maid_validate is provided by the Maid Runner MCP server (mamertofabian/maid-runner-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.