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I'm ready to accept a definition of "agent" that I think is widely-enough agreed upon to be useful, at least in the AI engineering space: An LLM agent runs tools in a loop to achieve a goal (I've been dismissing the term as hopelessly ambiguous for years) simonwillison.net/2025/Sep/18/...

simonwillison.netI think “agent” may finally have a widely enough agreed upon definition to be useful jargon nowI’ve noticed something interesting over the past few weeks: I’ve started using the term “agent” in conversations where I don’t feel the need to then define it, roll my eyes …

Like your definition, however, be better not to call them agents at all. Another case of anthropomorphism with AI (implying human characteristics they don't have) If something is called an agent, it must, in some sense, have agency, which, as you say, they don't.

I tried the "don't call anything agents" thing for a couple of years, but it feels counter-productive at this point - plenty of people are "building agents" now where what they mean is "LLMs achieving goals by running tools in a loop" and I want to be able to have conversations with them about it

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I don't understand the talk around using the word agent. We have had agent (and agentless) software for quite a while ie: terraform agent pool. That's not AI - it's a container that runs terraform. Prometheus agent, antivirus agent, logging agent... No LLM involved. "LLM agent" has no magic meaning

Over the past few years in the AI world people have said "I'm building an agent!" and then if you ask them what an agent is you find out they have a unique definition that's not the same as anyone else's This really annoyed me! I think consensus may be forming now over a reasonable definition

I’m curious how you define agency in such a way to exclude these things. Lacking “the capacity, condition, or state of acting or of exerting power” or not being a “thing through which power is exerted or an end is achieved?”

merriam-webster.comDefinition of AGENCYthe office or function of an agent; the relationship between a principal and that person's agent; the capacity, condition, or state of acting or of exerting power : operation… See the full definition

Well but picking a tool and then using the tool pretty much is the letter of the definition? It sounds like you're additionally reading "human" into that That tool may retrieve information but might also change something Like when a monkey puts a stick in a termite nest, is it showing agency?

I think your conception of “agency” here is mixed in with *accountability for the consequences* of said ability and actions, in which case I agree the LLM doesn’t [currently] have it.