diff --git a/metagpt/roles/ml_engineer.py b/metagpt/roles/ml_engineer.py
index e7fe38ff4..b039c61e7 100644
--- a/metagpt/roles/ml_engineer.py
+++ b/metagpt/roles/ml_engineer.py
@@ -9,7 +9,7 @@ from metagpt.schema import Message, Plan
 from metagpt.memory import Memory
 from metagpt.logs import logger
 from metagpt.actions.write_plan import WritePlan, update_plan_from_rsp, precheck_update_plan_from_rsp
-from metagpt.actions.write_analysis_code import WriteCodeByGenerate, WriteCodeWithTools
+from metagpt.actions.write_analysis_code import WriteCodeByGenerate, WriteCodeWithTools, MakeTools
 from metagpt.actions.ml_da_action import AskReview, SummarizeAnalysis, Reflect, ReviewConst
 from metagpt.actions.execute_code import ExecutePyCode
 from metagpt.roles.kaggle_manager import DownloadData, SubmitResult
@@ -126,6 +126,10 @@ class MLEngineer(Role):
                     context=context, plan=self.plan, code_steps=code_steps, temperature=0.0
                 )
                 cause_by = WriteCodeByGenerate
+                # make and save tools.
+                make_tools = MakeTools()
+                tool_code = await make_tools.run(code)
+                make_tools.save(tool_code)
             else:
                 code = await WriteCodeWithTools().run(
                     context=context, plan=self.plan, code_steps=code_steps, data_desc=""