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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds real value beyond that: nothing is stored or sent, the output is inline HTML rather than a file/URL/PDF, and the caller must supply the financial figures rather than have them recomputed. This is solid disclosure on top of annotations.

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 (QUAND...) followed by the output contract, which is good structure. Nearly every clause carries weight, though minor layout detail ('fenêtre droite') is a touch incidental. Overall compact and 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?

There is no output schema, so the description usefully explains the return value as complete inline HTML with no persistence. Combined with the 100%-covered input schema, an agent has enough to invoke it correctly. Return-value detail is present but could be marginally more explicit.

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%, so the schema already documents all 15 parameters in detail. The description only reinforces that recettes/dépenses/honoraires/solde come from the caller's dossier local and adds no format or syntax detail beyond the schema. Baseline 3 applies when the schema carries the load.

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 states a specific verb+resource: it produces a simplified 'COMPTE RENDU DE GESTION' returned as full HTML in the response. It also clarifies the artifact form (not a file, URL, or PDF), which is genuinely distinguishing. It does not name a sibling tool to differentiate against, so it falls short of 5.

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?

It gives explicit trigger conditions: at end of quarter, end of fiscal year, or at the owner's request. It also notes a prerequisite (recettes/dépenses/honoraires/solde are supplied by the caller from the local file) and a routing hint (guide the client toward /api-ia). No explicit when-not or named alternative tool, so not a 5.

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