get_book_pages

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

Annotations already declare readOnlyHint=true, covering the safety profile. The description adds meaningful context by stating that page images are not downloaded, which is a non-obvious behavioral trait. This transparency is valuable beyond the annotation.

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 sentence that is front-loaded with the action and resource. Every word earns its place; no filler or repetition.

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 list operation with one parameter and an output schema present, the description sufficiently communicates the purpose and the key constraint (no image downloads). It does not need to explain return values or complex prerequisites.

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?

There is one parameter (book_id) with no schema description (0% coverage), and the description does not explicitly explain the parameter. However, the parameter is self-evident from the tool name and 'for a book' phrasing, and with only one parameter, the meaning is fairly clear. The description adds only marginal value here.

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 'List' and identifies the resource 'page metadata for a book', clearly distinguishing it from sibling tools like get_book (book details) and list_book_thumbnails (thumbnails). The phrase 'without downloading page images' further clarifies the exact scope.

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 usage context by stating it lists metadata without downloading images, signaling it is the lightweight choice for page-related data. However, it does not explicitly name an alternative or state when not to use this tool, so it falls short of the highest bar.

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