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

Annotations already declare readOnly, idempotent, and non-destructive, so the safety profile is covered. The description adds only that the identifier originates from list_listing_changes; it says nothing about error behavior for stale/invalid change_ids or what the returned detail contains.

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 front-loaded sentence with no filler. It is efficiently structured, though its brevity leaves other dimensions under-specified rather than wasting words.

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 two-parameter read tool with full schema coverage and complete annotations, the essentials are present. However, with no output schema, an agent gets no sense of what fields the listing-change detail returns, which would be the one piece this description could usefully add.

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 coverage is 100%, documenting both asin and change_id including format hints, so the baseline is 3. The description reinforces where change_id comes from but adds no syntax or constraints beyond what the schema already provides.

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?

Identifies a specific resource ('one listing change') and single-item scope, and explicitly ties it to the sibling list_listing_changes. The action verb is nominal ('Detail of') rather than explicit, but an agent can immediately tell it apart from the list tool.

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 implied rather than stated: naming that the change comes from list_listing_changes hints at the required workflow, but the description never says when to use this versus the list endpoint or what to do if the change_id is unknown. No explicit exclusions or prerequisites.

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