wf_status

THE RISK

Low Risk

Why wf_status needs a policy

This tool queries and retrieves operational status information about a WriteFreely instance without modifying any data, triggering side effects, or executing arbitrary code. It is a passive health check mechanism, characteristic of Read category tools.

From the tool's definition Tool description states it 'Report[s]' and 'status' of a WriteFreely instance, retrieving health metrics: reachability, federation status, authenticated user, collection count. No creation, modification, deletion, or code execution is described.

Documented attack patterns abuse exactly the kind of access wf_status gives an agent:

POLICY

How to control wf_status

PolicyLayer is an MCP gateway — it sits between your AI agents and Crow, and nothing reaches the server without passing your rules. This is the rule we recommend for wf_status:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "wf_status": {}
  }
}

wf_status is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Crow — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about wf_status

What does the wf_status tool do? +

Report WriteFreely instance health: reachability, federation status, authenticated user, collection count. It is categorised as a Read tool in the Crow MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on wf_status? +

Register the Crow MCP server in PolicyLayer and add a rule for wf_status: 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 Crow. Nothing to install.

What risk level is wf_status? +

wf_status is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit wf_status? +

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

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

wf_status is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Crow tool call.

Start from Crow, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →