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 does disclose the 'available' filter qualifier, but says nothing about behavior when the id is not found or the vehicle is unavailable, nor about auth requirements, rate limits, or what a returned record contains.

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?

One short sentence with the core verb and accepted identifier forms front-loaded; nothing is padded or redundant. It is efficient, though it spends its brevity on restating schema content rather than adding new context.

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 simple single-parameter read tool this is close to adequate, but with no annotations and no output schema the description leaves the agent without any sense of the returned vehicle shape or failure behavior. It is minimally sufficient to invoke, not complete.

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% and the single parameter is fully documented in the schema ('Vehicle id or source_id / stock number'). The description restates the same dual nature (numeric id vs stock/source id) without adding format, validation, or precedence details, 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?

States a specific verb (get) and resource (one available vehicle) plus the two accepted identifier forms. It implicitly separates itself from search_vehicles by promising a single record rather than a result set, though it never names that sibling.

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?

Usage is only implied: the phrase 'one available vehicle' suggests this is a lookup for an id you already have rather than a discovery call. No alternative tool is named and there is no explicit when-to-use/when-not guidance, even though search_vehicles is the obvious routing alternative.

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