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

The description adds behavioral context beyond the annotations by mentioning 'paginada' (paginated), which is not covered by the readOnly/idempotent annotations. It does not contradict the annotations and provides useful information about the response behavior, though it does not elaborate on side effects or limits beyond pagination.

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 with no superfluous information. It effectively communicates the purpose and key input (brand slug) without unnecessary detail, making it well-structured and easy to parse.

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 the low complexity (three flat parameters, no output schema, clear annotations), the description is sufficient for an agent to understand the tool's purpose and usage. It does not need to cover output format or error cases for this simple read-only listing operation.

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% — all three parameters (marca, pagina, porPagina) have descriptions with examples and defaults. The tool description itself does not add extra meaning beyond the schema; it relies on the schema's parameter descriptions, so a baseline score of 3 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's function: 'Lista os modelos de uma marca do catálogo Carpedia' (lists the models of a brand from the Carpedia catalog). The verb 'Lista' and the resource 'modelos de uma marca' are explicit, and it is distinguished from sibling tools like carpedia_buscar_marcas (brands) and carpedia_buscar_versoes (versions).

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 usage by stating 'a partir do slug da marca' (based on the brand slug), indicating the need for a brand slug. However, it does not explicitly mention when to use this tool over alternatives or provide exclusion conditions, so the guidance remains implicit rather than explicit.

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