get_latest_books

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

The readOnlyHint annotation already covers safety, so the description does not need to repeat that. The phrase 'recently added or updated' adds behavioral context regarding the ordering/filtering logic beyond the annotation, though it does not disclose pagination or library filtering. This is adequate given the annotation coverage.

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 a single, efficient sentence with no redundant words. It earns its place, being both brief and informative at the high level.

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?

Although an output schema exists and read-only is annotated, the tool has five parameters that are entirely undocumented in both schema and description. The description does not mention optional library filtering, sorting, pagination, or the meaning of 'recently added or updated' in a way that would help the agent invoke the tool correctly. This is insufficient for a tool of this parameter complexity.

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%: none of the five parameters (page, size, sort, unpaged, library_id) have descriptions. The description of the tool does not explain any parameter semantics, so the agent has no information about what these parameters mean or how to use them. This is a significant gap.

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 'List recently added or updated books' uses a specific verb ('List') and resource ('recently added or updated books'), clearly distinguishing it from siblings like search_books (search) or get_book (fetch one). It is concise and unambiguous.

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 provided on when to use this tool versus alternatives. It does not mention exclusions or compare with similar list tools such as get_books_ondeck or search_books. The intent is implied by the name, but not explicitly stated.

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