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

Annotations already declare readOnly, idempotent, non-destructive, so the safety profile is covered. The description adds real value beyond that: prices are in US dollars, and the qualifiers 'where it exists' and 'where known' tell the agent that price, ISBN-13 and page count can be absent, which is important for handling partial results. It does not mention pagination or result ordering, keeping it at a 4.

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 with zero filler, front-loaded on the verb and resource, with the return fields listed after. It is dense and slightly run-on with its nested parentheticals, but every clause carries information an agent needs.

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?

There is no output schema, so the description must carry the return contract — and it does, naming every returned field and flagging which are conditional. Combined with a fully documented two-parameter schema and complete annotations, an agent has everything needed to call and interpret this tool.

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% — the id format and the full language enum with per-code meanings and default behavior are already documented in the schema. The description only implies the 'one title' scoping of id and says nothing extra about the language parameter's effect, so the baseline 3 applies.

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 ('Get the print editions of one title') and enumerates exactly what comes back: standard/large print, paperback/hardcover, USD price, ISBN-13, page count, product page URLs. This is clearly distinct from get_book or quote_custom_print, though it never names a sibling to contrast with, so it stops 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?

Usage is only implied: an agent can infer it should call this when it needs print-edition availability, price, or ISBN for a known title id. There is no explicit when-to-use guidance, no mention of quote_custom_print or create_custom_print_order as alternatives, and no stated preconditions (e.g., that the id must come from a search result).

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