Agent forwarding is powerful but dangerous. Prefer ProxyJump where applicable.
With Agent forwarding any authorised machine you connect to (and thus anyone who controls that machine) gets to use your credentials for the duration, to my knowledge no general purpose clients give you feedback on this usage, so you won't know if this happened - if Agent forwarding is enabled it can be used even if you never use it. With ProxyJump the intermediate doesn't get any view of your credentials, not even whether those are the same credentials you used for that intermediate host, or different. It is only enabling you to connect to a host it can reach that you can't reach directly and nothing more.