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

Annotations already declare readOnlyHint=true and idempotentHint=true, so the safety profile is established without description help. The description adds value by disclosing the specific attributes returned (connectors, power, access mode, status), going beyond the annotations. No failure or side-effect behavior is described, but for a read-only, idempotent tool the annotations carry the main burden.

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, front-loaded sentence with zero filler; it states the resource and its content compactly and every word earns its place. It reads as a noun phrase rather than a full behavioral statement, which is a minor stylistic shortfall.

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 low-complexity read tool (one required parameter, no output schema, no nested objects), the description names the returned content, partially compensating for the missing output schema. It does not mention error behavior for an unknown charge_point_id, but that is a minor gap for a read-only lookup whose annotations already confirm safety.

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%, with charge_point_id fully documented as 'Identificador de fábrica, p. ej. CP001'. The description adds no parameter-level semantics beyond what the schema already provides, 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?

The description 'Detalle de un cargador concreto: conectores, potencia, modo de acceso y estado' clearly states the resource (a specific charger) and the returned content (connectors, power, access mode, status), making the purpose unambiguous. It is implicitly distinguished from 'listar_cargadores' by the word 'concreto', though no explicit differentiation is made against the overlapping-sounding sibling 'estado_en_vivo'.

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?

No explicit when-to-use or when-not-to-use guidance is given, and no alternative tools are named. The word 'concreto' implies this tool is for fetching a single charger's detail rather than listing all chargers, but the agent must infer this; nothing routes the agent between this tool and 'estado_en_vivo', which also deals with charger status.

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