Results 3 issues of deanchanter

Why do the agents use langchain-type models, and tools use embedchain for custom models? This is confusing and limits the tools' flexibility since the embedchain does not support the number...

![image](https://github.com/user-attachments/assets/dc25d8c9-9f18-49e9-8291-7cd7e49593a6) ![image](https://github.com/user-attachments/assets/35ac43d6-803c-4e67-a46c-e9230c505996)

### Checked other resources - [X] I added a very descriptive title to this issue. - [X] I searched the [LangGraph](https://langchain-ai.github.io/langgraph/)/LangChain documentation with the integrated search. - [X] I used...