What is an ”AI agent”? Confusion abounds.There is also some consensus: agents must of course be AI-driven systems. They should have some degree of autonomy, and they should be able to use tools in addition to understanding and reasoning.But why isn't, say, ChatGPT an agent? According to most definitions out there, it actually is. Yet most (including OpenAI themselves) don’t describe it that way. In general, we seem to have a sense of “we’ll know it when we see it” with AI agents.To guide our bui...