This course fixes the problems that show up once basic tool use works. For example, Claude picks the wrong tool, your backend rejects a call, a spinner freezes, or input tokens grow with every tool result.
The course fixes one problem at a time, in order, across eight main lessons. Most open with a short video, and each shows how Meridian, a fictional engineering consultancy, fixed one problem. You write no code on the page, so you apply each fix to your own tools afterwards. You walk away knowing which fix fits which problem. Pass the graded quiz to earn your completion badge.
Who this course is for
This course is for you if tool use already works in your code. Claude calls a tool you defined, your code runs it, and the result returns to Claude. The course doesn't teach that first round trip.
Prerequisites
If you haven't written the tool loop by hand at least once, take Claude Platform 101 first. The code uses the Python SDK, and some lessons also show JSON. Reading both is enough. To try a technique yourself, you need an API key from a Claude Console account. Trying computer use also takes a desktop in a container and your own code to drive it.