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

Annotations only declare the generic safety profile (readOnlyHint=false, idempotentHint=false, destructiveHint=false). The description adds real behavioral context beyond that: the state transition being performed, an expected ~30 s latency, higher cost than a read, and battery consumption. It does not mention auth requirements or what happens if the car is already awake.

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 the action and its side effect, followed by the usage trigger and the cost caveat. No filler or redundancy.

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 not say what is returned or whether a failure/timeout occurs if the car does not come online within 30 s. Combined with 0% parameter coverage, the definition is adequate for invoking the tool but incomplete on inputs and result expectations.

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% for both parameters ('account' and 'veiculos'), so the description carries the full burden and adds nothing about them. It never explains what the account identifier is or that 'veiculos' is a list of vehicle identifiers, leaving both parameters semantically undocumented.

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 ('Acorda o carro'), clarifies the underlying mechanism ('sai do modo dormindo') and specifies a bounded wait (~30 s até ficar online). It implicitly separates the tool from the state-reading sibling ('Use antes de ler o estado'), but never names tesla_estado explicitly, so sibling differentiation relies on inference.

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 a clear triggering condition: use this before reading the state of a sleeping car. No explicit when-not guidance or named alternative is given, but an agent knows enough context to choose between waking and reading.

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