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

Annotations only declare readOnlyHint=false and destructiveHint=false; the description goes beyond them by disclosing the per-call cost ("호출마다 토큰 1소진"), the auth requirement, and detailed idempotency semantics (reuse only for lost-response recovery, new key for a new execution). Some phrasing is confusing ("anonymous taste calls") and the "provider-specific idempotency_key" note refers to a field that does not exist in this schema, which dilutes the value slightly.

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 is correctly front-loaded, but the middle section is dense and partly off-topic: the "anonymous taste calls" sentence and the provider-specific idempotency_key warning reference concepts not present in this tool's parameters. Mixed Korean/English and a trailing token-cost line make it read as accumulated boilerplate rather than a tight definition.

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?

There is no output schema, and the description never indicates what an init call returns or which tool should be called next, which is a real gap for a workflow-start tool. Auth, cost, and idempotency are covered, so the agent can call it safely but cannot plan the surrounding flow from this definition alone.

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 100%, so both parameters are already documented; the schema explicitly defers the idempotency key's meaning to the description. The description therefore earns credit for supplying the missing semantics (when to generate, when to reuse, when to discard the key). The account_link_id meaning is left entirely to 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?

States a specific verb and resource: "Initialize payroll amount change application." That is clearly distinguishable from search/report siblings. However, it never says what "initialize" actually produces or which tool consumes the initialized state, and it does not differentiate itself from the many other `__init` siblings in the namespace.

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 prerequisite "REQUIRES prior fourinsure__session__login call with same account_link_id" is an explicit gating condition, which is useful. But there is no guidance on when to choose this init over other init tools or what step follows it, so the workflow context is only implied.

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