Carlos, I for one certainly believe there is a great case for those higher-level agent-to-agent interaction protocols. In full disclosure, it would be hard for me NOT to as co-chair of the OASIS XDI Technical Committee—we’ve been developing a semantic data interchange protocol for this very purpose since 2004.
But I agree with the Agent WG chaired by Nathan Georger ( @nage) who feel XDI is overkill for many much simpler and lighter-weight interactions. So the Agent WG is working on lighter protocols that would still be considered application-level protocols, especially in the domain of specific APIs.
So I expect this to be a very active topic of discussion among the Agent WG for much of 2017.