Here are the best practices from Google for writing your app description: https://support.google.com/googleplay/android-developer/answer/13393723?hl=en#App%20descriptions
Here are some examples of approved apps in the Google Play store you can use as a reference:
Nanny / Sitter Agency:
https://play.google.com/store/apps/details?id=com.ionic.peasinapod
Dental Agency:
https://play.google.com/store/apps/details?id=com.ionic.dentalpersonnel
https://play.google.com/store/apps/details?id=com.ionic.smiledental&pli=1
