Stage 3 · How it gets to work
Tools
How does it do things in the world?
Functions the harness offers the model: searching the web, reading a file, running code, querying a system, sending an email. The model asks to use them; the harness runs them and hands back the result.
An image to remember it
Giving the new colleague access to the shared drive, the calculator and email.
The misunderstanding
The model browses the internet. The model only produces text. The one that runs the search is the harness.
What changes in practice
Tools define what it can do, and also what it can break. Check what permissions you give it.