find_books_for_topic
Match a topic or question area (for example: agent reliability, prompt injection, human in the loop, durable execution, when to trust AI) against the catalog's curated topic map. Returns the matching topics with their books, guide, and series. If nothing matches, returns the full topic list so yo...
This record as markdown: /tools/com-greenlitbooks-catalog/find-books-for-topic.md
What find_books_for_topic does on Greenlit Books
AI agents call find_books_for_topic to retrieve information from Greenlit Books without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
topic | string | Yes | The topic phrase to match. |
Parameters from the server's own tool schema.
Why find_books_for_topic is rated Low
Even though find_books_for_topic only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs find_books_for_topic safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Greenlit Books, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For find_books_for_topic, this is the rule to start with:
find_books_for_topic is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Greenlit Books, apply this rule, and every find_books_for_topic call is checked against it from then on.
Questions about find_books_for_topic
Match a topic or question area (for example: agent reliability, prompt injection, human in the loop, durable execution, when to trust AI) against the catalog's curated topic map. Returns the matching topics with their books, guide, and series. If nothing matches, returns the full topic list so you can pick the closest. It is categorised as a Read tool in the Greenlit Books MCP Server, which means it retrieves data without modifying state.
find_books_for_topic accepts 1 parameter: topic. Required: topic. The full parameter table on this page comes from the server's own tool schema.
Register the Greenlit Books MCP server in PolicyLayer and add a rule for find_books_for_topic: 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 Greenlit Books. Nothing to install.
find_books_for_topic is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the find_books_for_topic 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.
Set action: deny in the PolicyLayer policy for find_books_for_topic. 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.
find_books_for_topic is provided by the Greenlit Books MCP server (https://greenlitbooks.com/api/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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