crow_server_status

THE RISK

Low Risk

Why crow_server_status needs a policy

This tool performs a read-only operation that queries and displays the current status of servers. It has no side effects, does not modify data, execute external commands, delete resources, or involve financial transactions. The blast radius of misuse is minimal—an AI agent could only learn which servers are active, which poses no direct security risk.

From the tool's definition Tool name 'crow_server_status' and description 'Show which servers are active/inactive and their tool counts' indicate a query/status check operation that retrieves information about server state without modifying any data.

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

POLICY

How to control crow_server_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 crow_server_status:

policy.json

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

crow_server_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 →

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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 crow_server_status

What does the crow_server_status tool do? +

Show which servers are active/inactive and their tool counts. 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 crow_server_status? +

Register the Crow MCP server in PolicyLayer and add a rule for crow_server_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 crow_server_status? +

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

Can I rate-limit crow_server_status? +

Yes. Add a rate_limit block to the crow_server_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 crow_server_status completely? +

Set action: deny in the PolicyLayer policy for crow_server_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 crow_server_status? +

crow_server_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 →