crow_calibre_browse_category

Browse books within a specific category (e.g., a particular author, tag, or series)

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-browse-category.md

WHAT IT DOES

What crow_calibre_browse_category does on Crow

AI agents call crow_calibre_browse_category 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_browse_category is rated Low

This tool retrieves and displays existing book data filtered by category (author, tag, or series). It performs no modifications, deletions, or external operations. It is a straightforward read operation with minimal security impact.

From the tool's definition Tool description states 'Browse books within a specific category' which is a retrieval operation with no side effects. The verb 'browse' indicates querying/listing data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs crow_calibre_browse_category 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_browse_category, this is the rule to start with:

crow_calibre_browse_category Allowed

crow_calibre_browse_category 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_browse_category": {}
  }
}

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_browse_category call is checked against it from then on.

FAQ

Questions about crow_calibre_browse_category

What does the crow_calibre_browse_category tool do? +

Browse books within a specific category (e.g., a particular author, tag, or series). 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_browse_category? +

Register the Crow MCP server in PolicyLayer and add a rule for crow_calibre_browse_category: 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_browse_category? +

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

Can I rate-limit crow_calibre_browse_category? +

Yes. Add a rate_limit block to the crow_calibre_browse_category 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_browse_category completely? +

Set action: deny in the PolicyLayer policy for crow_calibre_browse_category. 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_browse_category? +

crow_calibre_browse_category 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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