This tutorial introduces a new square roots unary API for a calculator service. It covers the creation of RPC, implementation of server-side error handling for negative numbers, and client-side error testing. The video emphasizes the importance of documenting APIs and handling exceptions effectively.

What additional information can be provided in the error description for better debugging?

How does the client handle exceptions when calling the square roots API?

What is the significance of documenting the API's error types?