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

With no annotations, the description carries the full burden and it does well: it discloses validation behavior (out-of-series values refused, accessibility per the 24 Dec 2015 decree), the export to IFC with shared geometry/lining/panels, and that it is free with no key. The remaining gap is that it is unclear how an 'ouvertures[]' entry is supplied given the tool takes no input parameters.

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 WHEN-scenario is front-loaded, which is good, but the body is a single overloaded sentence packed with semicolons, a long parenthetical enumeration of family types, and an embedded validation clause. The family list could be trimmed without losing agent-facing value.

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?

There is no output schema and no annotations, so the description must stand alone, and it fairly comprehensively covers what families exist, how entries are validated, and that results are exported to IFC. The one unresolved point is the mechanism by which an `ouvertures[]` entry reaches a parameterless tool.

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 has zero input parameters, so the baseline is 4. The description references `famille` and `parametres` fields of an `ouvertures[]` entry, but these are not part of this tool's own schema, so they add no parameter semantics beyond the baseline.

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 (lists the parametric door/window families) and contrasts with the alternative approach of 'free-size holes'. An agent can understand the tool is a catalog of bounded joinery families. It does not name a sibling tool explicitly, so it stops short of a 5.

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 'WHEN you place doors or windows ... and want real, orderable joinery' clause gives a clear situational trigger for use. However, it never names an alternative sibling (e.g. cao_generer_ifc, cao_importer_ifc) or an exclusion condition, so no explicit routing guidance is provided.

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