Agile is not a noun. You develop with agility. Your team is agile.

The largest problem with so many of these discussions is that people talking about them have pinned themselves to the noun of capital "A" Agile instead of recalling that the point is to curate and practice an empirical process instead of a defined process like in manufacturing.

Scrum became one of the more popular process tool kits because it was a lot simpler to use than the entirety of eXtreme Programming (for example). Later a lot of consultant artifacts got piled on including a mishmash of other practices like Kanban, planning poker... etc. You won't find any of those in the original book on Scrum.

The point was always frequent course examination and correction. Ken Schwaber, author of the Scrum book, was also one of the original signatories to the manifesto: https://agilemanifesto.org/