Get book details from ISBN
AI agents call get-book-by-isbn to retrieve information from Book Database MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data (book details) by ISBN without any side effects. It performs a simple lookup/query operation with no reversible or irreversible modifications. The low severity reflects that misuse would only expose existing book metadata with no blast radius beyond information disclosure.
From the tool's definition Tool name is 'get-book-by-isbn' and description states 'Get book details from ISBN'. The server description confirms these are query-only tools that 'retrieve basic or detailed book information' with no mention of create, modify, or delete capabilities.
Attacks that exploit this kind of access
Get book details from ISBN. It is categorised as a Read tool in the Book Database MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Book Database MCP Server MCP server in PolicyLayer and add a rule for get-book-by-isbn: 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 Book Database MCP Server. Nothing to install.
get-book-by-isbn 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-book-by-isbn 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-book-by-isbn. 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-book-by-isbn is provided by the Book Database MCP Server MCP server (ps-copilot-sandbox/copilot-mcp). 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.
Teams ship this data inside their own products. See what a licence covers →