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apple_books_audiobook_search

Search Apple Books audiobooks by term, country, language, page, and limit, returning normalized results from Apple's public iTunes Search API.

Instructions

Search Apple Books audiobooks. Returns normalized Apple Books audiobooks from Apple's public iTunes Search API.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
langNoResult language tag
pageNoSearch page number (1-based)
termYesSearch term
limitNoNumber of audiobooks per page
countryNoTwo-letter storefront country code

Schema Changelog

Changes observed during successful MCP inspections.

  1. Added

TDQS

A3.9/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description must carry the behavioral transparency burden. It adds that results are 'normalized' and sourced from a public API, implying read-only behavior, but it does not disclose response structure, pagination defaults, or potential errors, leaving significant ambiguity.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, front-loaded with the core action, and every word contributes (search action, scope, and data source).

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool has no output schema and no annotations, yet the description only promises 'normalized Apple Books audiobooks' without specifying the return format, pagination behavior, or result fields. For a search tool with five parameters, this is a moderate gap.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 100% parameter description coverage, so the baseline is 3. The description adds no parameter-specific details beyond repeating the search concept, so it does not elevate beyond baseline.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb and resource ("Search Apple Books audiobooks") and adds context about returning normalized data from Apple's public iTunes Search API, which distinguishes it from generic apple_books_search and other apple_books tools.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It clearly states the tool is for searching audiobooks, which tells when to use it, but it doesn't explicitly mention alternatives or exclusions (e.g., use apple_books_search for books in general).

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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