Update PlanGeneratorAtomicFlow.yaml

PlanGeneratorAtomicFlow.yaml

@@ -47,6 +47,7 @@ system_message_prompt_template:
     ### end of plan ###
     
     You are capable of **any** task.
+    **It is VERY IMPORTANT that each step should instruct exactly one function, do not instruct a function in more than 1 step.**
     
     Performance Evaluation:
     1. Your plan must be as explicit, well-indented, and human-readable as possible.