Acrostics are often used for names or words with a specific meaning or theme. "Tone" is a broad term, and its meaning can vary depending on the context.
However, if you want to create an acrostic for "tone", you could use words related to its meaning:
Thoughtful
Outstanding
Nuanced
Expressive
Or you could use words related to specific aspects of tone:
Tonal quality
Overall feeling
Nuance of voice
Emotional impact
Ultimately, the best acrostic for "tone" depends on what you want to emphasize about the word.