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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the description is freed from proving safety. It adds real value on top: no credential/login needed, an explicit per-call token cost ('호출마다 토큰 1소진'), and idempotency/retry semantics. It stops short of saying whether initialization creates server-side state or expires, which is relevant for an 'init' tool.

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?

About two-thirds of the text is idempotency boilerplate for a single optional parameter, while the core question (what initializing means) is never addressed. The Korean cost note is front-loaded at the very end, and the phrase 'anonymous taste calls' is unclear/likely a typo.

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, so the description should convey what an 'init' call produces, and it does not — no mention of return values, a session handle, or how it chains into faqs__list. Auth and cost are covered, but the missing return/sequencing information is a real gap for an initialization tool.

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 baseline would be 3. The description goes further, explaining the lifecycle of request_idempotency_key (generate before first call, reuse only to recover a lost response, new key for new execution) and explicitly distinguishing it from a provider-specific idempotency_key.

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?

It names the resource (4대보험 FAQ list) and a verb (initialize), but never explains what 'init' actually does or how the result differs from the sibling fourinsure__b1__resources__faqs__list. An agent cannot tell from this text whether init returns data, creates a session, or just primes state.

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 detailed instructions on how to use request_idempotency_key, but no guidance on when to choose this tool over faqs__list or faqs__detail. Usage of the tool itself is left to inference.

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