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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is known. The description adds that the data is 'public' but does not disclose additional behavioral traits such as authentication needs, rate limits, or response format. It is consistent with annotations and adds minimal behavioral context.

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 sentence that front-loads the core subject ('Identite publique') and then adds purpose. It contains no filler or redundancy, making it highly concise and well-structured.

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 simple lookup tool with no parameters and no output schema, the description adequately conveys what data is returned and why it is useful. It could be slightly more explicit about the output format, but the provided details are sufficient for correct invocation.

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 has zero parameters, so the input schema fully covers the inputs (trivially). The baseline is 4 for 0-parameter tools, and the description does not need to add parameter information. It does not provide any input-related detail, which is appropriate.

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 clearly identifies the resource (the site publisher's public identity) and lists specific data fields (TENDIL COURTAGE, SIREN, ORIAS). It distinguishes itself from sibling tools by topic, but it lacks an explicit action verb like 'returns' or 'provides', which is a minor deduction.

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 a clear use case: verifying that the site is not fraudulent. It implies when to use the tool, but it does not explicitly mention alternatives or when not to use it. This is clear context without exclusions.

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