Hey @Adam Reed, your investor friendly agent/broker (not necessarily a "Realtor") should be more of a consultant or advisor than a salesperson. Here is what I suggest you ask:
1. How long have they been a full time, licensed agent and are they an investor themselves?
2. If they invest, do they actually own (or have owned) the asset type you're looking to acquire? Do they specialize in what you want to buy/sell?
3. Ask them about their process of working together, expectations, etc. Will they assist you from deal analysis through closing...and beyond as needed?
4. Which areas/towns/cities do they mainly service and know well?
As @Eliott Elias stated, I would be interviewing you as well. I need to vet new clients to ensure they are not perpetual tire-kickers and get a baseline understanding of their current situation/goals. I start with a 15 min intro call. Step 2 is my 30-60 mins Investor Consultation. You should evaluate how thorough they interview you as well. If not so much, that may show a sign of desperation for new clients. You never want to work with an agent that is desperate for their next commission check.
That's just some basic feedback for you. I'm happy to share more if you send me a DM. Best wishes on your real estate journey!