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

No annotations are provided, so the description carries the full burden. It usefully discloses the consent gate, the contact-method requirement, and that a lead_id plus delivery status come back, but it omits important behavior for a write tool that transmits PII to a third party: idempotency/duplicate handling, what happens if delivery fails, and whether the dealership is notified.

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?

Three short sentences, front-loaded with what the tool does and followed by prerequisites and return values. Every sentence carries information an agent needs, with no repetition of the title or filler.

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 compensates by naming the return values (lead_id, delivery status), and it covers the consent and contact requirements across all 7 documented parameters. Remaining gaps are failure semantics and the meaning of delivery status values, which are minor for a submission tool.

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 every one of the 7 parameters is already documented in the schema. The description only restates the consent and contact-method rules rather than adding syntax, format, or edge-case meaning beyond the structured fields, so the baseline 3 applies.

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 a specific verb and resource ('Submit a buyer inquiry/lead') and explicitly covers both operating modes: a vehicle-specific inquiry or a general inventory inquiry. It is clearly differentiable from read-only siblings like get_lead_status and search_inventory, though it never names them.

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 states two hard preconditions (consent=true, at least one of buyer_email/buyer_phone), which is real usage guidance. However, it never says when to prefer this tool over a sibling (e.g., when a lead already exists or the buyer should be pointed to list_dealers), and gives no when-not-to-use case.

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