Improve, rewrite, edit, or review prose so it is clear, direct, useful, and natural without inventing facts or erasing the author's voice. Use when drafting or revising emails, documentation, reports, essays, messages, UI copy, explanations, or other prose; when the user asks to write better, humanize text, remove AI-sounding language, tighten wording, improve clarity or tone, or make an action easier to understand. Do not use for translation or factual research unless writing quality is also part of the request.