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

Adds real behavior beyond the annotations: auth prerequisite, per-call token cost ('호출마다 토큰 1소진'), and the retry semantics of the idempotency key (same key only to recover a lost response; otherwise a new key is a new request). No contradiction with readOnlyHint=false, which the mutating 'init' semantics match.

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 prerequisite and purpose are front-loaded, but the idempotency paragraph runs long for a 2-parameter optional field and closes with a confusing line ('not available to anonymous taste calls') that costs clarity without adding actionable information.

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?

Covers prerequisites, cost, and idempotency, but never says what the initialization produces or what the follow-up call is in this flow, which is the key unknown for a stateful __init tool with no output schema. Adequate but with a clear gap.

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 coverage is already 100%, so the schema carries the account_link_id resolution rules. The description does add value on request_idempotency_key by explaining its lifecycle, but its extra remarks about 'provider-specific idempotency_key' refer to a field that does not exist in this schema and can mislead more than help.

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: 'Initialize health premium payment certificate (individual)'. An agent can identify the domain and the individual-scope variant, though the many sibling __init tools (payment_completion__init, workplace_member_list__apply__init, etc.) are never referenced to disambiguate intent.

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?

Explicit precondition: a prior nhis_edi__session__login with the same account_link_id, plus a clear rule for when to reuse vs. mint a fresh request_idempotency_key. Missing any statement of what to do after initialization or which sibling to call next, so it stops short of full routing guidance.

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