word-of-the-day
ChatGPTUse to render a word-of-the-day widget that shows one unusual vocabulary word for the user's local date. This tool is appropriate when the user wants a word of the day, asks to learn an interesting word today, requests a daily vocabulary card, or clearly wants the answer in widget form rather than plain text. The tool returns structured data for a single word, including the headword, pronunciation, part of speech, and definition, and the widget then displays that information in a compact literary presentation. The selection is deterministic for the user's local calendar date so the same user will keep seeing the same word throughout that day instead of receiving a fresh random result on every invocation. That behavior is intentional and should be preserved: use this tool for a stable daily word experience, not for repeated rerolling or for generating multiple alternatives. Do not use this tool when the user asks for plain-text only, explicitly forbids widgets or tool use, wants editing help, wants a list of many words, or needs general dictionary-style research unrelated to a daily featured word. Do not use it for spelling correction, translation, creative writing, or open-ended study plans. The tool takes no meaningful user input and should be called without arguments unless the platform supplies its normal request metadata. The widget it opens includes a copy control for the word and a speaker button that reads the word aloud in the browser when supported. The best user prompts for this tool typically mention a daily word, today's word, an unusual word to learn, a vocabulary card, or a desire to see the result in a widget. This tool is especially useful when the user values presentation and quick utility: they can read the definition, hear the word, and copy the headword without asking for follow-up formatting. It should be favored over plain text when the request is about surfacing a single featured word rather than discussing language in the abstract. The response is intentionally narrow and should remain narrow: one word, one pronunciation, one part of speech, one definition, and metadata describing the local date context that selected it. Do not treat this as a randomizer to be called repeatedly in search of a better word, because the stable daily behavior is part of the product requirement. Do not use it when the user asks for the newest slang term, a translation exercise, a dictionary lookup for a specific word they already supplied, or a broad educational worksheet. When the user wants the app itself to handle the presentation, with lightweight interaction limited to speaking and copying, this is the correct tool to call.
