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

With no annotations to lean on, the description carries the full burden and does so thoroughly: it warns about consent before sharing contact details, states there is no payment, reveals the status_token as the only retrieval key, and discloses the per-contact anti-abuse rate limit. This goes well beyond a generic 'send' statement.

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 text is front-loaded with the core action and then packs only high-value warnings and workflow notes. Every sentence earns its place, and the status_token/anti-abuse guidance is clearly delineated.

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 5-parameter tool with no annotations and no output schema, the description supplies the essential behavioral context: the return token, required consent, and rate limit. It is slightly incomplete on parameter-level detail (e.g., message and customer_email semantics), but the description is otherwise sufficient for an agent to call the tool safely.

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 needed to explain parameters, but it only adds meaning for vehicle_id ('optional (omit for a general inquiry)'). customer_email and message are still undocumented even though they are nullable/optional, and no formats or consent specifics are mapped to the contact fields.

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 opens with a specific verb and resource: 'Send a purchase inquiry (lead) to the VIP Cars sales team on the customer's behalf.' It also clarifies the downstream outcome (viewing/test drive) and thereby distinguishes itself from vehicle-lookup and status-checking siblings.

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 clearly frames when the tool is appropriate (customer wants to inquire about a purchase) and references get_inquiry_status as the later follow-up. It does not explicitly enumerate when not to use it beyond the 'no online payment' note and the anti-abuse limit, so it stops just short of full exclusion guidance.

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