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

It discloses traits not present in the annotations: a 0,01 EUR charge per useful response, no billing on failure or empty result, an Authorization-header API key requirement, and stable request_id for retries. This also explains why a search tool carries readOnlyHint=false – billing is a side effect. It stops short of describing result shape or 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?

Three short clauses, front-loaded with the purpose, then cost terms, then auth and retry mechanics. No filler, though the pricing sentence could tie more directly to the max_cost_cents parameter.

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 6-parameter tool with no output schema and zero schema descriptions, the description covers billing, auth and idempotency well, but omits spatial-search semantics (radius, limit caps) and the meaning of the cost cap parameter. Adequate for operation, incomplete for correct invocation.

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 0%, so the description must compensate and largely does not. It only explains request_id ('stable pour les reprises'), leaving latitude, longitude, radius_km, limit and especially the required max_cost_cents (presumably the cost ceiling tied to the 0,01 EUR pricing) undocumented anywhere.

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?

States a specific verb and resource ('Rechercher des stations') plus a hint of payload ('leur contexte documenté'), which separates it loosely from discover_plugtrip. However, it does not distinguish itself from the sibling station_context, despite the phrase 'contexte documenté' suggesting overlapping territory.

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 gives no when-to-use or when-not-to-use guidance and never names station_context or discover_plugtrip as alternatives. The retry/failure notes are operational rather than selection guidance.

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