Here's my attempt at explaining tool calling:

https://youtu.be/owDd1CJ17uQ?si=Z2bldI8IssG7rGON&t=1330

It's an _incredibly_ important concept to understand if you have even a passing interest in LLMs. You need to understand it if you want to have any kind of mental model for how LLM-powered agents are even possible.

Thank you, I watched it. The key takeaway I got was that the client (browser, I suppose) does the actual usage of such tools. The user hands over control of these tools to the AI (and the tool-use happens in the background so it might look to the user like the AI is the one doing the actual usage of the tools).