Car and motorcycle specs and review

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so safety is covered; the description adds useful behavior beyond that by enumerating the returned payload (power, torque, dimensions, rating, pros and cons, trims, other generations) and describing the mode switch when model is omitted. It doesn't mention rate limits, pagination, or failure behavior for unknown brands/models.

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-loads the resource definition in the first sentence, then usage examples, then the omitted-model behavior, then sibling routing. Dense but every clause carries information, including a concrete sample query that anchors interpretation.

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 six parameters, one required, and no output schema, the description carries the return-value burden and handles it by listing the main fields returned. It's nearly complete for a read-only lookup tool; the only gap is not stating the dependency on ba_vehicles for a valid brand key.

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 baseline is 3. The description reinforces only the model-omitted case ('lists the brand's models') and hints at review text via 'editorial review score'; it adds no meaning about trim keys, vehicle_type sections, or what full_equipment/description_chars actually toggle beyond what the schema already says.

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?

States a specific verb and resource: 'Technical specifications and the editorial review score of a car or motorcycle model'. It immediately distinguishes itself from siblings by naming ba_ad (what's for sale) and ba_new_prices (new cost), and the example question ('what engine, power and consumption does a Samand Soren have') makes the intended use concrete.

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?

Gives clear usage context: use it for a specific model's specs, to compare models, or omit 'model' to list a brand's models. It also routes the agent away to ba_ad and ba_new_prices. What's missing is any note that the 'brand' key comes from ba_vehicles first, which is implied only in the schema, not the description.

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