crow_paperless_get

THE RISK

Low Risk

Why crow_paperless_get needs a policy

This tool retrieves and queries document information (metadata and preview content) without creating, modifying, deleting, or executing operations. It is a straightforward Read operation with minimal blast radius even if misused by an AI agent, as the worst case would be unauthorized information disclosure of already-stored documents.

From the tool's definition Tool description explicitly states 'Get detailed metadata and content preview for a specific document' — the verb 'Get' and the read-only nature of retrieving metadata and previews indicate no modifications or side effects occur.

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

POLICY

How to control crow_paperless_get

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_paperless_get:

policy.json

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

crow_paperless_get 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 crow_paperless_get

What does the crow_paperless_get tool do? +

Get detailed metadata and content preview for a specific document. 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_paperless_get? +

Register the Crow MCP server in PolicyLayer and add a rule for crow_paperless_get: 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_paperless_get? +

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

Can I rate-limit crow_paperless_get? +

Yes. Add a rate_limit block to the crow_paperless_get 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_paperless_get completely? +

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

crow_paperless_get 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 →