crow_identity_verify

ServerCrow
CategoryRead

WHAT IT DOES

What crow_identity_verify does on Crow

AI agents call crow_identity_verify to retrieve information from Crow without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why crow_identity_verify needs a policy

This tool retrieves and validates existing attestation records without creating, modifying, or deleting data. While it performs cryptographic verification (a form of execution), the primary function is data retrieval and validation.

From the tool's definition Tool verifies attestations and fetches attestation data from local database. Uses words 'Verify', 'Fetches the latest', and 'cryptographically verifies' indicating read and validation operations without modification of data.

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

POLICY

How to control crow_identity_verify

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_identity_verify:

policy.json

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

crow_identity_verify 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.
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Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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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.
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FAQ

Questions about crow_identity_verify

What does the crow_identity_verify tool do? +

Verify an attestation for a given (crow_id, app, handle) triple. Fetches the latest non-revoked attestation from the local database and cryptographically verifies the signature. For cross-instance verification, the caller. 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_identity_verify? +

Register the Crow MCP server in PolicyLayer and add a rule for crow_identity_verify: 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_identity_verify? +

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

Can I rate-limit crow_identity_verify? +

Yes. Add a rate_limit block to the crow_identity_verify 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_identity_verify completely? +

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

crow_identity_verify 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.

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