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

Annotations already declare readOnlyHint=false, destructiveHint=false, openWorldHint=false, and the description adds genuinely new facts: one token is consumed per call, an XBOSS task is created and its result stored, and the call is explicitly "not purely read-only" despite looking like a validation. The idempotency paragraph also spells out reuse-vs-new-key semantics. Minor deduction because the generic Korean boilerplate ("기관 데이터 변경은 도구별 실행 내용과 기존 확인 절차를 따릅니다") is vague and sits in some tension with the schema's "Nothing is saved or submitted."

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?

It front-loads the login prerequisite well, but then spends six sentences on idempotency boilerplate that applies to every tool in the family, plus an unrelated clause about "anonymous taste calls" and four lines of generic Korean text. The core operation is one sentence; the rest is unbounded boilerplate that dilutes the signal.

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 two-optional-parameter validation tool with no output schema, the essentials are covered: auth prerequisite, non-submitting behavior, side effects (token cost, XBOSS task), and idempotency recovery. The one gap is that the los_init prerequisite and the missing_required_fields/field_errors response shape live only in the input schema description, not the tool description.

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% and account_link_id is fully self-documented, so the baseline is 3. The description goes beyond the schema for request_idempotency_key — the schema merely defers to the tool description, which then explains when to generate, when to reuse, when a new key means a new execution, and that provider-specific idempotency_key fields are distinct. That is real added meaning, though the "anonymous taste calls" clause is unexplained.

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?

"Validate employee qualification loss draft without submission" gives a specific verb (validate) and resource (qualification-loss draft), and "without submission" separates it from the save/submit path. It does not, however, name its sibling draft-validate tools (acqs/chg/dependent) or explicitly route to los_init, so differentiation stops at the resource name in the tool title.

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 concrete and actionable, and "without submission" implies this is the pre-save check rather than the write. But there is no explicit statement of when to choose this over los_save or which of the four draft_validate siblings applies, leaving the agent to infer the workflow position.

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