Get information about a book given an ISBN.
AI agents call get_isbn to retrieve information from BrasilAPI MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
ISBN | string | — | The book's ISBN to query |
Parameters from the server's own tool schema.
This tool retrieves read-only information about books based on ISBN input. It has no side effects, does not modify data, execute code, delete resources, or involve financial transactions. The operation is a simple lookup/query operation consistent with the Read category. Low severity reflects minimal risk if misused by an AI agent.
From the tool's definition Tool name 'get_isbn' and description 'Get information about a book given an ISBN' indicate a retrieval operation that queries book data by identifier.
Attacks that exploit this kind of access
Get information about a book given an ISBN. It is categorised as a Read tool in the BrasilAPI MCP Server MCP Server, which means it retrieves data without modifying state.
get_isbn accepts 1 parameter: ISBN. The full parameter table on this page comes from the server's own tool schema.
Register the BrasilAPI MCP Server MCP server in PolicyLayer and add a rule for get_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 BrasilAPI MCP Server. Nothing to install.
get_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_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_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_isbn is provided by the BrasilAPI MCP Server MCP server (mauricio-cantu/brasil-api-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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