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

Annotations already declare readOnlyHint and openWorldHint, and the description adds beyond them by disclosing the per-call point cost and the Korean-vehicle scope. It does not describe response details, but this is a simple read-only lookup and no contradiction exists.

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 English and Korean sentences are compact and front-loaded with the core purpose before cost and use case. The Korean sentence largely repeats the English sentence, causing slight redundancy, but the overall entry remains efficient.

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 two-parameter, read-only lookup with no output schema, the description covers what, how, why, and cost. It could improve by naming related car-lookup siblings or describing the response format, but nothing essential is missing for invoking correctly.

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 both type and value are already documented in the schema. The description only restates the type-to-VIN/plate mapping without adding new format or validation details, so it earns the baseline score.

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 states a clear verb and resource: checking whether a Korean vehicle has a scrap/total-loss accident record, keyed by VIN or license plate. It does not explicitly differentiate itself from sibling tools such as get_car_flooding or get_pccc, so it stops short of 5.

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 gives an explicit intended use case: used before buying a used car. It does not, however, mention when to prefer an alternative or when not to use this tool, so it lacks the exclusions needed for a 5.

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