[smacktoward]

My understanding of the word lines up pretty well with the Merriam-Webster definition (https://www.merriam-webster.com/dictionary/salty): feeling or showing resentment towards a person or situation; bitter.

By that standard, just telling someone not to do something wouldn't be salty. Salty is telling someone not to do something because only an idiot would do that.

[gnode]

This seems to me to be detecting how "snarky" a comment is, rather than how salty, as it seems to include snappy, sarcastic, and impertinent comments.