Chord Variations is a web-based chord variation generation tool, accessible at https://chord-alt.vercel.app/。根据页面提供的说明，它的核心用途是：把和弦加入和弦进行（progression），然后点击“Generate”即可得到变体（variations）。
Main capabilities and usage: Users can add chords to a chord progression; the page indicates that up to 5 chords can be added (Max chords: 5), and unwanted chords can be removed by clicking a red button. After setting up the chords, click the "Generate" button to generate; generation may take about a minute (Might take a minute for generation to complete). The page also provides a "Take A Tour" entry to guide users through the tool's operation process.
Applicable scenarios: Based on the functional description, this tool is suitable for music creators or learners who need to explore different chord variations for an existing chord progression and look for alternative chord arrangement ideas to experiment with and reference.
Limitations and information not yet provided: The current material only states a maximum of 5 chords, that chords can be removed, that generation may take about a minute, and that a guided tour is provided; details such as supported instruments, music styles, export formats, whether login or payment is required, the music theory basis for the generated results, browser compatibility, and mobile support are not yet provided.
