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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so safety is covered. The description adds which fields the detail includes, useful context, but omits behavior on missing/invalid IDs and any return format discipline.

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 compact sentence with the resource front-loaded and no filler. Efficient, though its terse listing style leaves little structure beyond the field enumeration.

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?

No output schema exists, and the description effectively compensates by listing the fields the detail returns. With one well-documented parameter and complete read-only annotations, an agent has enough to invoke it correctly; only error-case behavior is unaddressed.

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 description coverage is 100% and there is only one parameter whose format ('p-...' or slug) is fully documented in the schema. The description adds no parameter meaning beyond that, so the baseline 3 applies.

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?

Names a specific verb-resource pairing ('Detalle de un producto de NAO') and enumerates the fields returned (precio, stock, vendedor, imagen, condiciones de entrega). An agent can tell it retrieves a single product's detail, though it doesn't explicitly contrast with buscar_productos or ver_tiendita.

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 by the resource: fetch the detail of one product. But the description gives no explicit condition for choosing this over buscar_productos (search/list) or other siblings, and no prerequisite or when-not guidance.

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