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

Annotations already declare readOnlyHint/destructiveHint=false, so safety is partly covered. The description still adds real behavioral context: no bank access, that it returns a proposed accounting entry plus a next action (quittance if complete, otherwise a receipt). It stops short of stating permissions or whether the proposal is persisted.

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?

Front-loaded with the trigger condition and packed with routing information without filler. It is telegraphic and slightly dense (mixed French shorthand plus a REST path), but every clause carries signal.

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, the description usefully states what comes back (proposed entry + next action) and the precondition relative to quittance_loyer. For a proposal-style tool this is nearly complete, though auth/permission context is absent.

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 100% across 7 params, so the schema already carries the semantics; baseline 3 applies. The description only reiterates the date+montant confirmation and the extrait_bancaire branch, which the enum description already conveys.

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 action (propose the accounting entry for a declared rent payment) and names the resource unambiguously. It explicitly distinguishes itself from the sibling quittance_loyer by stating it must be called 'AVANT quittance_loyer', so an agent can route without opening schemas.

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 ('QUAND le client vous dit qu'un loyer a été payé'), an explicit ordering rule versus the alternative (before quittance_loyer), and a branch condition for the bank-statement case (source=extrait_bancaire). When/when-not/alternative are all covered.

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