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

Annotations supply readOnlyHint and openWorldHint, and the description adds useful behavior: automatic recognition of printed information, conditional requirement for card_sn, a legal-consent prerequisite, and a per-call point cost. There is no contradiction with the annotations.

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 first English and Korean sentences both state the same verify-from-image/PDF purpose, creating redundancy. The legal-use warning and cost note are valuable, but the duplicated purpose could be trimmed.

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?

It covers input requirements, the conditional card_sn, and legal prerequisites, which is enough to attempt a call. However, there is no output schema and the description does not explain the result format or failure behavior of the verification result.

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 schema already documents image_url and card_sn. The description repeats the card_sn condition but adds no parameter meaning beyond 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 states a specific action (verify authenticity) on a specific resource (Korean alien registration card) from image/PDF, so an agent can identify the core purpose. However, the sibling tools identi_card_image1-4 appear nearly identical, and the description offers no explicit differentiation among them.

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 clearly communicates context: ARC authenticity verification, image/PDF input, card_sn requirement for post-2011 cards, and lawful basis. It does not state when to prefer this tool over the many sibling identity and OCR tools, or what cases should use an alternative.

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