BooksGetBook

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

Annotations already convey readOnlyHint=true and destructiveHint=false; the description adds no behavioral context beyond restating that the call fetches one book. It does not mention error handling, auth, response shape, or that bodyBookId may be semantically required despite the schema listing it optional.

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?

A single, front-loaded six-word sentence fully states the operation; no filler or redundancy.

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?

For a simple read-only getter with one parameter, the basics are present. However, with no output schema, no mention of lookup failure behavior, and no guidance about when the id is required, the description is adequate but not fully self-sufficient.

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 0%, so the description must compensate; 'by id' correctly identifies bodyBookId as the book identifier. Since this is the only parameter, that is sufficient semantic clarification, though it leaves the exact body/location and optionality to the schema.

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?

Description states a specific verb ('Get'), a resource ('book'), and a selection criterion ('by id'), making the tool's role immediately clear. This also differentiates it from sibling list tools like BooksGetBooksPlatform and BooksGetBooksSchool.

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?

No guidance is given about when to prefer this tool over the plural BooksGet* alternatives or how to handle optionality. The only implied usage is the noun phrase itself, leaving the agent to infer selection criteria from the sibling names.

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