crow_calibre_list_books

List books in the Calibre library with sorting and pagination

SERVERCrow SOURCEkh0pper/crow

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/kh0pper-crow/crow-calibre-list-books.md

WHAT IT DOES

What crow_calibre_list_books does on Crow

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

RISK

Why crow_calibre_list_books is rated Low

This tool retrieves and queries data from a Calibre library. The terms 'list' and 'pagination' are classic indicators of read operations. There are no side effects, no data modification, no execution of code, and no destructive or financial implications. The operation is purely informational.

From the tool's definition Tool name 'crow_calibre_list_books' and description 'List books in the Calibre library with sorting and pagination' indicate a read-only operation that retrieves book metadata without modifying, deleting, or executing operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs crow_calibre_list_books safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Crow, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For crow_calibre_list_books, this is the rule to start with:

crow_calibre_list_books Allowed

crow_calibre_list_books is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Crow, apply this rule, and every crow_calibre_list_books call is checked against it from then on.

FAQ

Questions about crow_calibre_list_books

What does the crow_calibre_list_books tool do? +

List books in the Calibre library with sorting and pagination. 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_calibre_list_books? +

Register the Crow MCP server in PolicyLayer and add a rule for crow_calibre_list_books: 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_calibre_list_books? +

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

Can I rate-limit crow_calibre_list_books? +

Yes. Add a rate_limit block to the crow_calibre_list_books 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_calibre_list_books completely? +

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

crow_calibre_list_books 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.

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