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

No annotations are provided, so the description carries the full behavioral burden. It does disclose one meaningful trait — 'libre (sin pago)' (free, without payment) — which is useful for an agent weighing cost implications before invocation. However, it says nothing about return format, size, or other behavioral traits. The disclosure is helpful but minimal.

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 phrase with every word earning its place — no filler. It is front-loaded with the purpose and the cost trait. It borders on under-specification, but that concern belongs to the completeness dimension rather than conciseness, which is excellent.

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?

For a zero-parameter informational tool with an output schema present, the description is minimally adequate — it states what the tool provides and its cost. However, it lacks usage context and any framing for when an agent should select it among siblings. Given the tool's simplicity, an output schema covers return semantics, but the missing usage context keeps this from being complete.

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 tool has zero parameters, so the baseline of 4 applies. There is no parameter information to document, and the empty schema with 100% coverage means nothing is left undocumented. The description correctly omits parameter details that don't exist.

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 states a clear resource ('Catálogo y precios de Automan') and the nature of the tool as an informational lookup. It distinguishes well from sibling tools (analisis_datos, grafico, traduccion, etc.), all of which are processing or generation tools rather than catalog/pricing lookups. It's clear but terse — a specific verb is implied rather than stated.

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?

There is no guidance on when to use this tool versus alternatives. The description is a bare statement of what the tool returns with no mention of context, preconditions, or exclusions. An agent must infer from the resource name alone that this is the right tool for catalog/pricing queries, with no explicit routing help.

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