Function calling requires the client to define functions upfront. WAW enables server-side capability description. Think of it as: - Function calling: Client t

Function calling requires the client to define functions upfront. WAW enables server-side capability description. Think of it as: - Function calling: Client tells LLM "here are tools you can use" - WAW: Service tells agent "here's what I can do" You can actually combine them—use WAW manifests to auto-generate function definitions dynamically. We show this in the demo.