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

Annotations already flag destructive=true and idempotent=false, but the description adds what the annotations cannot: the two-phase preview/execute safety gate, the consent requirement, and the side effect that a client notification is queued and counts as the day's message (one per day). That is meaningful behavior beyond structured fields.

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?

Three dense sentences with no filler, and the identification source (id from lister_fermetures) plus the optional notification are front-loaded. Slightly packed, but every clause carries actionable information.

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 destructive, open-world mutation with four params and no output schema, the description covers the identifier source, the preview/confirm protocol, the consent requirement, and the notification side effect and rate rule. Nothing essential for a correct call is missing.

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?

Schema coverage is 100%, so the baseline is 3; the description still adds cross-parameter meaning the schema does not, notably that texte is only relevant when prevenir_clients=true and that confirmer governs preview vs. execution. It stops short of describing the preview's contents or failure modes.

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+resource: deleting a closure period by its id, and names lister_fermetures as the source of that id. An agent can distinguish it from ajouter_conges/lister_fermetures without opening any schema.

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 operating procedure: call with confirmer=false for a preview, show it to the person, get explicit agreement, then re-call with confirmer=true. It also spells out the optional path (prevenir_clients=true + texte) and references envoyer_message for the notification rules.

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