It might be diffrent depending on who you ask, ive heard that u can kinda tell by rubbing them around ur gums, super bitter/spicy its bad - i dont think id eat a bit of them, some types take a few days to show signs, like ik that for some people some coral mushrooms can upset their stomachs but it effects them 2-3 days later....

Personally i dont do either of these methoods, the easiest way is by looking up id guides online, they give descriptions as well as if theres any look alikes... all you gotta look up is "your region + forageable mushrooms" which should give you a good list of whats in your area or what to look for, i do agree with being 100% sure on an id before eating tho