Récupère la liste des groupes de rayons, utilisés pour organiser les catégories de produits. Chaque groupe peut regrouper plusieurs rayons.

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

The annotations provide readOnlyHint=true, which tells the agent this is a safe read operation. The description adds no behavioral context beyond what the annotations already provide - no information about rate limits, authentication needs, response format, or other behavioral characteristics. However, it doesn't contradict the annotations, so it gets a baseline score.

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 'Liste des Lister les groupes de rayons' is grammatically awkward and appears to be a translation error or duplication ('Liste des' followed by 'Lister les'). It's extremely brief but not effectively concise - it's under-specified rather than efficiently informative. The phrasing doesn't earn its place as a helpful description.

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 read-only listing tool with no output schema, the description is inadequate. It doesn't explain what information is returned, how results are structured, whether there's pagination, or any other contextual details needed to use the tool effectively. The title provides more useful information than the description itself.

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?

With 0% schema description coverage for the single parameter 'format', the description carries full burden for explaining parameters but provides none. However, the parameter has an enum with clear options (json, csv, html) and a default value, making it self-explanatory. The baseline score of 3 reflects that while the description adds no parameter information, the schema itself is sufficiently clear.

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 'Liste des Lister les groupes de rayons' is tautological - it essentially restates the tool name 'data_list_department_groups' in French. While the title provides context about retrieving groups used to organize product categories, the description itself adds no meaningful clarification about what the tool actually does beyond repeating the name.

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 provides no guidance on when to use this tool versus alternatives. Given there are 14 sibling tools including 'data_list_departments' which might be related, there's no indication of how this tool differs or when it should be preferred over other listing tools. The description offers no contextual usage information.

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