I really regret the proliferation of terms like "toxic" to describe things as benign as this. I think it's literally recoloring people's perception of what bad communication actually looks like.
You brought the word up, not me. The tiles are simple - avoid character attacks, and don’t be passive aggressive. Be direct and firm.
Otherwise people will go off topic and take whatever meaning they want (like I did with Linus’) comment and you did the same with the word toxic, which you introduced