Agile is continuous adaptation of methods to the particular circumstances of the team (both it's tasks, and it's composition in terms of individuals.) That's all Agile is.
The problem is that concrete fixed methodologies that are applied in the same way in widely divergent organizations under the oversight of gun-for-hire “master project managers” and other consultants, the exact phenomenon Agile emerged as a reaction against, are now being sold with “Agile” attached to them as a hollow, meaningless buzzword.
The Agile movement is in part to blame, because while the Manifesto has a great statement of values, there is no concrete operationalization of them embraced by the movement that emphasizes adaptation of process. (Which is one way in which the Lean community is a somewhat better forum for similar values, since it emphasizes more high-level metamethodology around evaluating and adapting methods, making it somewhat more resistant to being converted into a label for fixed process.)