The body is mostly efficient, but the "功能描述" restates the frontmatter description and the "使用示例" section duplicates the two examples already shown in "调用方式"; the "所属分类" path is non-essential metadata — content that could be tightened rather than the lean "every token earns its place" bar of 3.

It provides fully executable Python with imports and concrete arguments, plus a complete parameter table (type, required, default, description) — copy-paste ready rather than pseudocode or abstract description.

This is a simple single-task skill and the single action (call doc2docx with input/output) is unambiguous, so per the simple-skills note workflow clarity scores 3 without a multi-step sequence; it is not a destructive/batch operation requiring validation checkpoints.

The skill is small and self-contained with no external references needed; content is organized into clear sections (功能描述, 调用方式, 参数说明, 返回值, 使用示例) with no nested references, satisfying the simple-skills allowance for a 3 on well-organized sections.

The description states one concrete action — "将旧版 Word 文档（.doc）转换为新版（.docx）" (converts .doc to .docx) — which is specific rather than vague, but it lists a single action, not the "multiple specific concrete actions" the score-3 anchor requires.

It answers both "what" (converts old Word to new) and "when" with an explicit trigger clause — "当用户提到 doc 转 docx、旧 Word 转新 Word 时使用" — matching the score-3 anchor's "Use when…" pattern; it is not the score-2 case where "when" is only implied.

It covers natural user phrasings — "doc 转 docx" and "旧 Word 转新 Word" — plus the file extensions ".doc"/".docx", giving good coverage of terms a user would actually say.

The niche is narrow and unambiguous (.doc→.docx format conversion) with distinct triggers, making it unlikely to fire for unrelated skills; it is well above the score-2 "could still overlap" case.