Over at The Verge, Kylie Robison writes:

Anthropic is releasing a new feature for its AI chatbot Claude that will let anyone create an email assistant, a bot to purchase shoes, or other personalized solutions. It’s called “tool use” (or the nerdier “function calling”), and it hooks up to any external API of your choosing.

As a pro user of Claude, I didn’t get the memo! Someone should set up a function for that. 🤣