How would you interview a financial advisor?

TLDR: What questions might you ask a financial advisor if you were interviewing them? I I'm comfortable managing my own portfolio, but i don't know what questions to ask about advisors. So why am I asking? well it's not for me. My in-laws are retiring soon, and i've had a number of conversations with them about retirement, healthcare in retirement, the 4% rule of thumb and more real world examples with guardrails, and basic BogleHeads investment strategy. When i realized that a 3-4 fund portfoli