Michigan's default bodily injury limits are 250/500 — far higher than any other state's minimum. Drivers may select 50/100 instead, but only by signing a written waiver. If nobody in your household has signed one, your actual minimum is 250/500, and a teen driver is the worst possible reason to reduce it.
Michigan's 250/500/10 minimum is higher than most states, but it is still a floor rather than a recommendation for a household with a new driver.
Michigan is a no-fault state. Personal injury protection pays your teen's medical costs regardless of who caused the crash, which changes how medical bills are handled but does not reduce your liability exposure.
Uninsured motorist coverage is not required in this state. It is still worth carrying — it is the part of the policy that protects your own teen rather than the other driver.