The "problem" is that LLMs are being asked to decide on whether, and which part of, the "sideband" data is relevant to request and act on the request in a single step. I put the "sideband" in scare quotes, because it's all in-band data. There is no way in architecture to "tag" what data is "context" and what is "request", so they do it the same way you do it with people: tell them.