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

Annotations already declare readOnly, idempotent and non-destructive, and the trailing 'Read-only' merely restates that. The description earns credit for what annotations cannot cover: prices are explicitly reference prices in EUR, and printed copies are only present 'when offered', which warns of conditional return content.

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?

One front-loaded sentence covering contents first, then the options list. The nested parentheticals are dense but every clause names real return data, so little is wasted.

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?

With no parameters and no output schema, the description must carry the return-content burden, and it does: novel spec fields plus enumerated option categories and pricing. Only the response structure and whether prices vary by region remain unstated.

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?

The tool takes no parameters, so the baseline applies and there is nothing for the description to disambiguate. It correctly implies a single unfiltered catalog response.

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?

States a specific verb and resource: it describes what a Novelist novel includes and lists its options with EUR reference prices. That content is clearly distinguishable from siblings like prepare_novel or get_novel_status, though no sibling is named explicitly.

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?

Usage is only implied — a zero-parameter catalog call that an agent would naturally reach for before prepare_novel, but the description never says when to call it or what to do with the results. No exclusions or alternatives are given.

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