List Wallapop categories

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

With no annotations, the description carries the burden of behavioral disclosure. It states that it returns top-level categories with ids and subcategories, indicating a read-only operationhol, but it doesn't describe the exact structure or any potential variations, which is a minor gap.

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?

The description is a single concise sentence that efficiently conveys the tool's purpose. It loses a point for not being front-loaded with the action, but it's clear and to the point.

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?

Given that the tool has no parameters, no output schema, and the description provides a clear indication of what is returned (categories with ids and subcategories), the description is adequate. It could have mentioned whether the subcategories are nested or a flat list, but the description's level of detail is sufficient for an agent to use the tool correctly.

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?

The schema has zero parameters, and the schema coverage is 100%, so there are no parameters, and the description adds that it's a simple read operation. Since there are no parameters, the description explains the return format (ids and subcategories, which is the purpose, but it might be a simple operation. This is a simple read-only and the description. This is a simple read-only, but I'm not the memory of the context, but the schema covers all the 0 parameters and the description is clear, but it is a simple description. The description doesn't need to explain parameters beyond that, and it doesn't add much beyond the schema, but the schema itself is empty, so the description is the main source of parameter semantics, which it handles by describing what the tool returns, but not in terms of parameters. With 0 parameters, the baseline is 4 because there are no parameter details to provide, but the description could have mentioned the output format or usage. The description does state the output includes ids and subcategories, which is helpful for the agent knowing what to expect, so a 4 is appropriate.

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?

The description clearly states the tool lists all marketplace top-level categories with ids and subcategories, which is specific and distinguishes it from the sibling tools (search_products, get_listing, etc.).

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 implies that this tool is used to obtain the full category tree, which is useful before searching or scanning. It doesn't explicitly mention when not to use it, but the purpose is clear in the context of the other tools.

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