What 'is' Agent Identity? Human? Workload? A new Layer? (opens in new tab)

In previous posts, I’ve covered the reasons why an AI agent needs an identity. I recommend reading that first. In this post I want to nail down “what is agent identity” because I’ve seen a lot of different interpretations from smart people such as “use OAuth” to “it’s just workload identity”, and new protocols cropping up, etc. But what “is” an agent identity in concrete terms? An AI agent is ...