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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, and the description adds real context beyond them: no payment taken, nothing stored, €1,000 launch price, and what the buyer receives (a booking link and a pre-written email with the brief). It stops short of stating limits such as how quickly the call is scheduled or whether repeated calls are deduplicated.

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 core action and when-to-use are near the front, but the text carries promotional material ('viral videos by format, topic and style', launch pricing) that does not help an agent decide or invoke. It is longer than needed for a three-parameter booking tool.

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, and the description does cover the return values: a booking link plus a pre-written email so Sonia arrives prepared. The main gap is the undocumented 'language' parameter and the absence of any note on how the nested brief is validated or what happens if it is omitted.

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 description says to give the campaign brief (product, goal, market, platforms) and optionally an email, which matches the nested brief schema fields. The 'language' enum parameter is never explained in either the schema or the description, and schema coverage is only 67%, so the description adds some but not full meaning.

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 names the service and its verb clearly: it finds and vets creators for a buyer, then books a 15-minute call with Sonia. That is distinguishable from siblings like about_creator_validator and start_order, though the marketing framing ('Find + Vet by SoniaIA') delays the operative action.

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?

Explicit when-to-use is given: 'Use when the buyer has no shortlist, only a partial one, or asks for help choosing or selecting creators.' It does not name start_order or get_pack_options as alternatives, so routing between siblings is left partly to inference.

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