diff --git a/metagpt/actions/make_tools.py b/metagpt/actions/make_tools.py
index 7fd05751e..9da829e1f 100644
--- a/metagpt/actions/make_tools.py
+++ b/metagpt/actions/make_tools.py
@@ -11,8 +11,10 @@ from metagpt.actions.write_analysis_code import WriteCodeByGenerate
 
 class MakeTools(WriteCodeByGenerate):
     DEFAULT_SYSTEM_MSG = """Please Create a General Function Code startswith `def` from any codes you got.\n
-    **Notice:The import statement must be written after `def`, it is very important for you.
-    Reflect on whether it meets the requirements of function. Must Write example code, and we will execute the example code.**
+    **Notice:1. The import statement must be written after `def`, it is very important for you.
+    2. Reflect on whether it meets the requirements of function.
+    3. Refactor your code with the best performance when dealing with big data.
+    4. Must Write example code, and it could be execute in the user machine.**
     """
 
     def __init__(self, name: str = '', context=None, llm=None, workspace: str = None):