Reader comments

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

Annotations already establish that the operation is read-only and idempotent. The description adds useful behavioral context beyond that: newest-first ordering, 20-per-page pagination, edition names appearing on each comment, and the fact that edition_id filters the fetched page. No contradiction with annotations.

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?

Two focused sentences carry all essential information with no filler. The core purpose and ordering/pagination are front-loaded, followed by the edition-related nuance and parameter guidance.

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 read-only, 3-parameter tool with no output schema, the description gives enough information to understand what will be returned: comments, sorted newest first, paginated, with edition context. It could be slightly more complete about the id parameter's dual role as book_id or edition_id, though the schema covers that.

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%, so the schema already documents all three parameters. The description restates the edition_id filtering behavior but adds little beyond the schema, aside from clarifying that filtering applies to the fetched page.

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 identifies the resource (reader comments on a book) and adds scoping details (newest first, 20 per page, edition labeling). It does not use an explicit verb like 'list' or 'get', and it never names sibling tools to contrast against, so it falls just short of a 5.

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 the tool (when reader comments are needed) and gives specific guidance on passing edition_id to filter. However, it does not explicitly distinguish book_comments from close siblings like book_details or book_editions, nor state when not to use it.

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