get_book_info

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

No annotations are provided, so the description bears full burden. It discloses the tool returns metadata fields (title, authors, etc.) but does not mention side effects, auth requirements, or error conditions (e.g., invalid book_id). Acceptable but not thorough.

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 extremely concise: two sentences for the main description and a docstring-style parameter listing. Every part adds value, no 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 tool has only one parameter, schema coverage 0%, and an output schema exists (reducing need to explain return values), the description covers the essential behavior. Minor omission: no mention of what happens if book_id not found, but acceptable for simplicity.

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 coverage is 0%, so the description must explain parameters. It clearly defines book_id as 'The Calibre book ID', adding semantic meaning beyond the schema type 'integer'. No other parameters exist, making this sufficient.

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 clearly states the tool retrieves detailed metadata for a book by its Calibre ID, specifying the exact resource (book) and action (get info). It distinguishes from siblings like search_books (search) and set_metadata (update).

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 the tool is for retrieving full metadata when you know the book_id, but does not explicitly contrast with siblings or mention when not to use it (e.g., for searching by title, use search_books).

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