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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds that results may include the mapped category, which is modest additional value but does not disclose limits, result counts, or ranking 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?

A single well-formed sentence with the key qualifier ('partial query') and the category-mapping note front-loaded. No filler.

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 an output schema present, return shape need not be explained, and annotations cover safety. For a one-parameter read-only tool the description is sufficient, though a note on how it differs from depop_search would close the last gap.

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 0% on the single 'query' parameter, so the description carries the burden; it adds meaning by specifying the input is a 'partial query' (prefix-style text). It stops short of describing length limits, casing, or matching behavior.

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 (autocomplete suggestions) and resource (Depop search box) with the qualifier 'for a partial query', which cleanly separates it from depop_search. It does not name a sibling tool explicitly, but the intent is unambiguous.

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?

'For a partial query' implies the trigger condition, but there is no explicit when-to-use versus depop_search/depop_search_facets guidance, and no statement about when autocomplete is inappropriate (e.g. full-text search).

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