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

The readOnlyHint annotation already covers the safety profile, so the description does not need to restate read-only behavior. It adds useful context about the data source ('Projet Ariane') and the returned sections, but it does not disclose error behavior or missing-slug handling. No contradiction with annotations.

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?

One concise, front-loaded sentence that names the action, the resource, and the key returned content in a compact parenthetical. Every word adds value and there is no repetition of schema details.

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 simple one-parameter, read-only tool with no output schema, the description adequately conveys what will be returned and from which data source. It could be slightly more complete by tying usage to a prior search step via rechercher_aides, but that is not necessary to invoke the tool correctly.

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%: the slug parameter is already documented as a URL identifier with examples. The description adds no additional parameter meaning, so the baseline score of 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?

States a specific verb ('retourne'), a specific resource ('fiche d'une aide financière'), and lists the contained fields (description, montant, profils éligibles, liens officiels). It does not explicitly name the sibling search tool, but the 'fiche complète' wording makes the record-lookup purpose distinguishable from a search tool.

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 guidance is given about when to use this tool versus rechercher_aides or fiche_metier. An agent must infer that this tool requires a known slug and likely follows a search step, but the description does not state that or mention any alternatives or exclusions.

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