crow_calibreweb_download

Get a download URL for a book in a specified format, or get the web reader URL

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-calibreweb-download.md

WHAT IT DOES

What crow_calibreweb_download does on Crow

AI agents call crow_calibreweb_download 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_calibreweb_download is rated Low

This tool retrieves or queries information (download URLs and web reader URLs) without creating, modifying, deleting, or executing side effects. The action is purely informational and safe, warranting a 'Read' classification with low severity.

From the tool's definition Tool performs retrieval operations: 'Get a download URL' and 'get the web reader URL' — both read-only queries that return URLs without modifying data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs crow_calibreweb_download 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_calibreweb_download, this is the rule to start with:

crow_calibreweb_download Allowed

crow_calibreweb_download 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_calibreweb_download": {}
  }
}

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_calibreweb_download call is checked against it from then on.

FAQ

Questions about crow_calibreweb_download

What does the crow_calibreweb_download tool do? +

Get a download URL for a book in a specified format, or get the web reader URL. 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_calibreweb_download? +

Register the Crow MCP server in PolicyLayer and add a rule for crow_calibreweb_download: 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_calibreweb_download? +

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

Can I rate-limit crow_calibreweb_download? +

Yes. Add a rate_limit block to the crow_calibreweb_download 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_calibreweb_download completely? +

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

crow_calibreweb_download 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.

KEEP EXPLORING

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