apple_books_audiobook_series

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

With no annotations provided, the description carries the full burden. It discloses that the tool reads from Apple Books' public catalog page (implying no auth), returns series metadata and the full ordered list of audiobooks, and highlights the domain distinction. It does not cover pagination or error behavior, but for a read-only retrieval this is adequate.

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

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

The description is three sentences, front-loaded with the primary action. The first and second sentences overlap slightly (both mention retrieving the series and its list), but the third sentence adds a valuable distinction. Efficient overall, with minimal fluff.

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

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

Given the absence of an output schema and annotations, the description adequately explains what the tool does, where the data comes from, and how this resource differs from a book-series. It lacks return-format specifics, but for a straightforward retrieval tool the essentials are covered.

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

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

Schema description coverage is 100% — all params (id, lang, country) already have descriptive definitions. The description does not add param-specific meaning beyond what the schema provides, so the baseline score of 3 is appropriate.

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

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

The description uses a specific verb+resource ('Retrieve an Apple Books audiobook series and its full audiobook list') and clearly states the output (series metadata and ordered audiobook list). It also distinguishes from the sibling apple_books_series tool by explicitly noting that an audiobook-series is distinct from a book-series, even for the same conceptual series.

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

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

The description implies when to use this tool versus alternatives by clarifying that an audiobook-series is a distinct catalog resource from a book-series. This helps an agent choose between apple_books_audiobook_series and apple_books_series, though it does not explicitly name the alternative or provide exclusions.

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