Conciseness

The body is lean — two short code blocks, a tight parameter table, and minimal prose with no padding about what pencil sketching is or how the algorithm works. Every token earns its place, matching the top anchor; it is not score 4 because there is no over-explanation to trim.

Actionability

It provides fully executable, copy-paste-ready Python ("from skills.image import pencil4img; pencil4img(input_img='./test.jpg', output_path='./', output_name='pencil4img.jpg')") plus a complete parameter table with types and defaults and a second usage example. This matches the top anchor; it is not score 4 because the common case is fully covered with no key details missing.

Workflow Clarity

This is a single-action skill (call the function to produce an output file), and the action is unambiguous, so the simple-skill exception applies. It is not a destructive or batch operation, so the validation cap does not apply; it is not score 4 because no sequence gaps exist for a single call.

Progressive Disclosure

The skill is under 50 lines with no external references needed and no bundle files present, and it is organized into clear sections (功能描述, 调用方式, 参数说明, 返回值, 使用示例, 原始函数). Per the rubric's simple-skill guideline, well-organized sections alone earn the top score; it is not score 4 because organization is clean with no gaps.

Specificity

The description names one concrete action — "将输入的图片转换为铅笔画风格" (converts input images to pencil sketch style) — which matches the anchor naming a domain and 1-2 concrete actions without being comprehensive. It is not score 2 (which would be only generic actions) because the action is specific, nor score 4 because only a single action is enumerated.

Completeness

It explicitly answers both "what" (converts images to pencil sketch style) and "when" (当用户提到铅笔画、素描、画风转换、图片转素描时使用) with concrete trigger phrases. This matches the top anchor; it is not score 4 because the "when" clause is explicit and specific rather than only broadly implied.

Trigger Term Quality

The phrase "铅笔画、素描、画风转换、图片转素描" provides good natural keyword coverage including synonyms a user would actually say. It is not score 5 because no file-extension terms (e.g., .jpg) are included, and not score 3 because multiple relevant natural terms beyond a single keyword are present.

Distinctiveness Conflict Risk

Pencil-sketch style image conversion with distinct triggers (铅笔画/素描/画风转换/图片转素描) carves a clear niche with minimal overlap risk against other skills. It is not score 4 because the triggers are specific enough to avoid overlap with related image skills.