The language problem around agents is that most companies are describing them solely from a human/UX perspective.

'You ask it to do something, and it does it'

That makes it difficult to differentiate the more critical 'how' options in the execution process. From that perspective: deterministic integrations, LLM+tools, LAM, etc are more descriptive categories, each with their own capabilities, strengths, and weaknesses.

Or to put it a different way, if the term doesn't tell you what something is good and bad at, it's probably an underspecified term.