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

Annotations already declare write (readOnlyHint=false), openWorld, and non-idempotent. The description adds substantive context beyond that: consent is required, a provisional record is persisted, and contact/notification are deferred until confirmation, plus a 10-minute validity window for the returned action_id. This two-phase-commit semantics is exactly the kind of behavior annotations cannot convey.

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?

Dense, front-loaded three sentences with no filler; the mandatory-input constraint and the confirmation workflow are surfaced early. Slightly repetitive opening ("demande de rappel" twice) but essentially efficient.

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 4-parameter write tool with no output schema, the description covers the critical unknowns: it is a consented write, it is provisional, and confirmation is required before contact. The undocumented prenom/message fields are the only notable gap.

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 description coverage is 0%, so the description must carry parameter meaning. It correctly clarifies that consent must be true (the schema only sets default=false, so this is real added semantics) and restates email as required. However prenom and message are left entirely undocumented in both schema and description.

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: preparing a callback request ("demande de rappel") as a consented write. The two-phase nature (provisional registration awaiting confirmation) makes it distinguishable from write siblings, though it never names an alternative tool. Clear but without explicit sibling differentiation.

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 frames the tool as the first step of a confirm-later flow ("a confirmer par l'utilisateur", "valable 10 minutes"), which implies when it applies, but there is no explicit when-to-use/when-not statement or routing to confirmer_action/annuler_action. Usage is implied rather than stated.

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