I think in some people's opinion, my midwife would be considered "unsafe" but only based on things her experience level allows her to be comfortable with doing such as twins, VBACS, and breech births. These things are a matter of opinion though. I think as long as the midwife is 100% honest at all times about her birth philosophy, routine care, how she handles emergencies, etc. Now certain things I don't believe are a matter of opinion such as having a birth assistant. One midwife alone just wont cut it in the rare instance things go south. REsponsible midwives know you need an extra set of hands such as when I had a PPH and my midwife couldn't leave me long enough to run to her back in the other room to get her pit and had to bark orders to the assistant while she did uterine compressions.
I have heard stories of midwives misrepresenting themselves and upon interview until contracted or paid, sell one birth philosophy, then offering less than the standard of care. These you can't foresee unfortunately. Or the ones who seem to agree with your birth philosophy only to do things "their way" as it comes up.
Go with your gut. Things like whether she attends breech deliveries, VBACS, twins, believes in delayed cord clamping, herbals and supplements instead of prenatal vitamins, or what her birth philosophhy, Id say just make sure it reflects yours, you feel comfortable with her from the first meeting, she doesn't try to talk you into beliefs she has that you don't share. As long as she offers regular prenatals, offers testing when symptoms suggest it be nessesary such as UTI's and such, seems proactive such as suggesting iron building foods and herbs if you even start to show signs of anemia (as not all test but just take precautions) for example, is honest about transfer rates, ...
Speaking of transfers, ask midwives about theirs and the what-if's and when they transfer. If they act like they dont transfer except in last resort as if they are against it, or even give the slightest hint they may keep you at home too long if signs show you need to be elsewhere to protect their transfer rate or reputation or pride, then bail.
When talking to my midwife, I was asking her about unforeseen emergencies and she gave me a very detailed step by step explaination on what we would do in the case of each one but said very calmly that if those things didn't work, we transfer as a healthy baby is the ultimate goal and most important and though it very very rare, the need doesn't arise from time to time and she would still be with me if I have to go but only as my "doula" as she is only a CPM and not legal in my state, and would do her best to advocate for me so that we could still stick to my original wishes as much as possible without compromising mine or baby's health.
It made me feel very comfortable with it. She was very comfortable in telling me specific examples of instances that required transfer and the events that led up to that decision and how it played out and the outcome. If a midwife is uncomfortable in telling about when things didn't go as planned Id take it as a red flag somewhat that they felt they did something wrong.
4 years ago, my first meeting with my midwife, my gut told me we were a perfect match. She was only a DEM at the time and was working under another more experienced midwife who I loved but after meeting with only once I knew we had slightly different philosophies. I was still comfortable with her but you have to find one that "fits" you. My midwife for example may be a bit too hands off, comfortable with things other midwives aren't. She has delivered babies all over the world, worked with Ina May Gaskin on "The Farm" and has seen "almost" everything. She is confident in her abilities but not overly so that she would throw caution to the wind as she recognized even before I did that I needed intervention last time. (I should have felt odd but she noted my skin color and flush and sensed it before it happened and is really in tune with her instincts as a baby catcher.
Some women though are more comfortable with a more medicalized midwife. I think its all about finding the right fit, a likeminded birthing woman. Other than that, go with gut, look for red flags and never compromise what you are comfortable with because it's someone elses way of doing things and they arent willing to bend to give you the experience you want.