The phrase “watch your tone” is a typical idiom used to precise disapproval of somebody’s. It’s sometimes used when somebody is being perceived as being impolite, disrespectful, or aggressive. When somebody tells you to “watch your tone,” they’re basically asking you to be extra conscious of how you might be talking and to regulate your tone to be extra applicable for the state of affairs.
There are a lot of the reason why somebody is perhaps requested to “watch their tone.” Maybe they’re talking too loudly, or utilizing inappropriate language. Perhaps they’re being sarcastic or dismissive. Regardless of the motive, you will need to pay attention to how your tone is being perceived and to make changes as wanted.