added comment

vision_agent/agent/vision_agent.py

@@ -77,6 +77,7 @@ def run_conversation(orch: LMM, chat: List[Message]) -> Dict[str, Any]:
  conversation=conversation,
  )
  message: Message = {"role": "user", "content": prompt}
+ # only add recent media so we don't overload the model with old images
  if (
  chat[-1]["role"] == "observation"
  and "media" in chat[-1]