What is the first marketing task you would actually trust an agent with?

I would start with work that repeats often, has a visible quality bar and is reversible when it goes wrong. Research synthesis can fit. Final positioning probably does not. What is repetitive but still annoyingly judgement heavy in your team?

We started with turning customer calls into a weekly themes note. It is small but the team actually reads it, which was a better test than generating more content.

For us it was campaign QA. The agent checks links, naming and tracking before launch. Very boring job, but easy to verify and it saved us a few mistakes already.

I would pick something where a bad answer cannot reach a customer. Research or internal briefing first, then give it more room once the team trusts the output.