Hi @Abhishek_Patel 

I am just curious why you are calling LLM inside a UC function. It should always be the other way around. Also, the failure could be the UC function to access LLMs, as Databricks has not yet enabled using LLM endpoints in the Agent Endpoint subagent. But can you create simple UC functions to see if the calling is working? This functionality has just been added to the Agent Bricks, so I would test it with simple UC functions. Please let me know, and share the error and logs if you are still facing the issue with simple UC functions.