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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It reveals only that the result is a daily question drawn from the book's ten questions and includes a work track, but it does not state whether the operation is read-only, how the daily question is selected, or what the response looks like.

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 is a single compact phrase with no filler, and it front-loads the core idea 'La question du jour' before adding context. It loses a point only because the opening phrase largely repeats the tool name and the description reads more like a label than an instructive sentence.

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 output schema and no annotations, the description should clarify what the agent receives and how to interpret it. It mentions the question and the work track, but leaves unspecified the output format, the meaning of 'piste de travail', and how 'daily' selection works, which is a meaningful gap even for a no-parameter 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 declares zero parameters, so there is nothing for the description to clarify. The baseline of 4 for a no-parameter tool applies; the schema coverage of 100% is vacuously satisfied.

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 identifies the resource as 'La question du jour' and adds provenance ('tirée des 10 questions du livre') plus a component ('avec sa piste de travail'), so it is more than a bare tautology. However, it is a noun phrase with no verb or explicit operation, and it does not distinguish the tool from siblings like get_test or search_book.

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 gives no guidance on when to use this tool versus alternatives, no exclusions, and no context about selection criteria such as date or randomness. An agent must infer usage from the name alone.

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