[nlarew]

> Can't we just have a set of best practices around API endpoints/functions? Like, imo we could just keep using Rest APIs and have a convention that an agent exposes endpoints like /capabilities, /task_status ...

To make this work at scale we all need to agree on the specific routes names, payloads, behaviors, etc. At that point we have defined a protocol (built on top of HTTP, itself a lower level protocol).