Exclude all sorts of irrelevant information your eye color, the number of times you won Candy Crush, etc. Why will anyone care about this book? That gives you some wiggle room. At some houses, book ideas still matter a lot. The Overview should employ the same combination of vivid description, charm, and salesmanship the publisher will eventually use to woo book buyers.
Born in a mud hut without shoes, water, or power, he struggled after the genocide to gain an education and to learn to forgive the killers. What need does it fulfill?
If they sign a lot of authors whose books sell well, they will be respected and secure in their job. Then try to capture that effect to make the subject of your book sound new or intriguing in your Overview.
Overview For most acquisition editors, this is a very important part of the proposal.