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

Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description adds the non-obvious cost signal '[호출당 20포인트]' (20 points per call), which is real behavioral context an agent needs and cannot get from structured fields. It still does not describe rate limits or error behavior.

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?

Content is front-loaded with the retrieval scope before the field list, and each element earns its place. The main inefficiency is full duplication across English and Korean, which pads length without adding information.

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 output schema, the description's enumeration of returned fields (title, price, rating, reviews, availability, seller, features, images) usefully compensates by telling the agent what a call yields. Combined with annotations covering the open-world read profile and the stated per-call cost, it is largely complete for a simple two-parameter lookup.

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% and the schema already states that one of url or asin is required (including the /dp/ASIN format and ASIN length). The description merely restates 'URL or ASIN' without adding syntax or precedence beyond what the schema provides, so the baseline of 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 (조회/retrieve) and a specific resource (Amazon product), and it enumerates the exact fields returned (title, price, rating, reviews, availability, seller, features, images). The Amazon/URL-or-ASIN scoping distinguishes it from generic search siblings like google_shopping_search, though it never names an alternative 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?

The 'by URL or ASIN' phrasing implies the input condition under which the tool is used, but there is no explicit guidance on when to prefer it over google_search, google_shopping_search, or how it relates to amazon_reviews_create. Usage is implied rather than stated.

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