over-commenting is explaining in pseudo-english what you've written in code. Prentend you are at the United Nations but you speak all the langauges, so you don't need a word-for-word translation. You don't understand to motivations of every speaker though, nor their cultural influences and a million other factors, so context is super important. In the briefings you get some of the information is not new; but if the vast majority of what you're told is obvious or discernable from what people say, you're looking at over commenting. It's not a yes-no thing but a balance of evidence, subjective opinion.