Instead of the agent deciding one step at a time, why might you ask it to generate a full "Task List" first?

AI agents often rely on external tools/APIs. How would you design a system that ensures robustness when these dependencies are unreliable or slow?

How does the model actually "call" a tool? Explain the back-and-forth between the Assistant message and the Tool/Function message in an API loop.

Why do we typically include a 10–20% overlap between text chunks? What happens to the retrieval quality if the overlap is zero?