Contrary to other comments I think you’re actually trying to provide a meaningful “blunt” to “not likely to become a problem” lookup table of sorts. Hope it works.
I think that if you expanded the scope a bit to include advice on when to avoid saying something, it would be more helpful. For example, "I told you so" shouldn't really be said in most contexts. It comes off as unprofessional no matter how you say it, so there's no entry you could create that would not seem wrong. If in those cases you suggest alternatives to saying anything, it would come off better.
