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 the chaining relationship with depop_shop, which is useful context, but says nothing about result volume, pagination, or match behavior beyond the chaining note.

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 compact sentence with the purpose front-loaded and the workflow hint trailing, with no wasted 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?

An output schema exists, so return values need not be explained, and the chaining hint covers the main integration need for a one-parameter search tool. Only minor gaps around matching behavior remain.

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?

With schema description coverage at 0% for the single 'query' parameter, the description carries the burden, and it does clarify that the query accepts either a real name or a username. That is a meaningful addition, but no format, matching, or partial-match guidance is given.

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 (Find), a specific resource (Depop users/sellers), and the input modality (by name or username). It clearly distinguishes itself from sibling item-search tools like depop_search and depop_shop.

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 description explains the downstream workflow -- a matched result's username feeds directly into depop_shop -- which tells the agent when this tool is the right first step. It stops short of naming alternatives (e.g., depop_suggest) or stating exclusions.

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