AI agents call openlibrary_get_book to retrieve information from UnClick without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
work_id | string | Yes | e.g. OL45804W |
Parameters from the server's own tool schema.
This tool queries and retrieves book metadata from Open Library, a public reference library. The 'Get' verb and read-only nature of retrieving published book information classify it as a Read operation. Severity is low because it has no blast radius—retrieving publicly available library data poses minimal risk even if misused by an agent.
From the tool's definition Tool name 'openlibrary_get_book' and description 'Get a book from Open Library by work ID' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
Get a book from Open Library by work ID. It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
openlibrary_get_book accepts 1 parameter: work_id. Required: work_id. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for openlibrary_get_book: 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 UnClick. Nothing to install.
openlibrary_get_book 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 openlibrary_get_book 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 openlibrary_get_book. 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.
openlibrary_get_book is provided by the UnClick MCP server (@unclick/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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