Get detailed metadata for multiple books in a single request.
AI agents call get_books_batch to retrieve information from Neolibrarian MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves book metadata in batch without any write, execute, or destructive side effects. The read-only nature of the server and the explicit 'get' operation confirm the Read category. Severity is low because metadata retrieval poses minimal risk—no data is modified, executed, or deleted, and the blast radius of misuse is limited to information disclosure.
From the tool's definition Tool name 'get_books_batch' and description 'Get detailed metadata for multiple books in a single request' clearly indicate retrieval operations.
Attacks that exploit this kind of access
Get detailed metadata for multiple books in a single request. It is categorised as a Read tool in the Neolibrarian MCP MCP Server, which means it retrieves data without modifying state.
Register the Neolibrarian MCP server in PolicyLayer and add a rule for get_books_batch: 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 Neolibrarian MCP. Nothing to install.
get_books_batch 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 get_books_batch 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 get_books_batch. 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.
get_books_batch is provided by the Neolibrarian MCP server (pshap/mcp-neolibrarian). 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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