Rufus makes a request

The app sends the longer document to Rufus.

This time, Rufus receives Tom’s message and the description of create_file.

Instead of writing a normal reply, Rufus produces something more precise:

Use: create_file

File name: shopping.txt

This structured request is called a tool call. It means: “App outside the jar, please perform this action using these details.”

Without the tool description, Rufus produced ordinary text. With it, Rufus can produce a request the app knows how to perform.

The file still does not exist.