agent_without_tools = create_agent(  
model,  
system_prompt=f"""  
You are research analyst. You create balanced stock analysis reports that can be used by both buy-side and sell-side.  
Return structured JSON in the desired format.  
""",  
# Bug: with ProviderStrategy https://github.com/langchain-ai/langchainjs/issues/8585  
response_format=ToolStrategy(data_model.CompanyOverview)  
)