SSE Stream event order for Chatflows

[hammermaxmann]

I realized the order of events when streaming a response is alsways the same.

E.g.

message:
data:{"event":"start","data":"..."}

message:
data:{"event":"token","data":"..."}

...

message:
data:{"event":"usedTools","data":[{"tool": ...}]}

message:
data:{"event":"metadata","data":{...}}

message
data:{"event":"end","data":"[DONE]"}

Question

Chat GPT seems to be able to detect tool usage before the actual response is parsed, why is that? Can we also do this with Flowise to get "real-time" tool usage information?