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

Annotations already declare readOnlyHint=true and openWorldHint=true, and the description adds valuable behavioral context: it auto-recognizes the printed information, performs authenticity verification, requires a lawful processing basis, and notes the per-call point cost. It does not describe the output format, but for a read-only verification tool this is a minor gap.

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 description is short, front-loaded with the core purpose, and every sentence adds useful information: what it does, input expectations, legal constraints, and cost. There is no redundant 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?

For a one-parameter read-only tool, the description covers the essential context: input type, operation, legal prerequisite, and cost. It does not explicitly state the return value shape, but '진위 여부를 확인합니다' implies a pass/fail or verification result, which is adequate for this simplicity level.

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 the baseline is 3. The description adds that only one file is needed and that no text input is required, but it uses 'upload' rather than echoing the URL-based parameter. Most parameter meaning is already fully covered by the schema.

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 clearly states a specific verb and resource: verifying the authenticity of a Korean driver license from an image or PDF. It is distinct from general OCR and other document types, but it does not explicitly differentiate itself from similarly named sibling tools such as identi_card_image1 or identity_document_driver_license.

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?

The description gives useful context: use it when you have a driver license image or PDF and no text input is needed, and only when you have a lawful basis. However, it does not mention alternatives or explain when not to use this tool, especially given the large number of similar identity-verification siblings.

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