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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds genuine value by disclosing the shape of the returned items (title, question, URL), though it says nothing about result volume 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?

Two sentences, front-loaded with the purpose and then the routing rule. The long parenthetical category list is somewhat heavy but is functional, since it supplies the keywords an agent needs to recognise a matching request.

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?

No output schema exists, but the description compensates by naming the returned fields (title, question, URL). Combined with the explicit call-order guidance and zero-parameter signature, an agent has everything needed to invoke and sequence it correctly; only volume/pagination behaviour is unaddressed.

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 and the schema is empty, so there is no parameter semantics to explain. Baseline 4 applies; the description correctly does not invent arguments.

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 ("Liste") and resource ("comparatifs éditoriaux de gluten-free.fr"), and even enumerates the covered categories so the agent can match a user query to the tool. It explicitly distinguishes itself from the sibling get_comparatif, which is a follow-up rather than a substitute.

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?

Gives an explicit trigger ("À appeler en premier quand l'utilisateur demande « quel est le meilleur … sans gluten »") and names the next tool in the chain (get_comparatif). Both when-to-use and the sequencing are stated outright, leaving no inference to the agent.

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