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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds real value by enumerating what the response contains (rank, reason for selection, address) — important since no output schema exists — but says nothing about result count, freshness window, or whether the set can be empty.

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 naming the resource, its curated/monthly nature, and the fields returned. Every clause earns its place and there is no filler.

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?

With no parameters, a fully covered empty schema, and annotations handling the safety profile, the description covers what an agent needs: the source of the selection and the shape of the results. Minor omissions (how many offers, whether the list can be empty, ordering guarantee) keep it short of a 5.

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 takes zero parameters, so by the rubric the baseline is 4. There is nothing for the description to disambiguate beyond the absence of filtering, which it does not claim to support.

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 specific verb+resource: it returns the monthly curated selection of top referral offers, including rank, selection reason, and each listing's address. This is clearly distinguishable from search-oriented siblings like rechercher_offres or offres_par_categorie, though none of them are named explicitly.

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 nature of the tool (call it when you want the editorially-ranked top offers of the month), but there is no explicit when-to-use statement, no exclusions, and no reference to alternatives such as rechercher_offres. The agent must infer the boundary itself.

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