Hello @jakiripsc ,
You should add as much data as possible to add a new POI. However, Opening date, owners phone number etc. are not mandatory to provide as a Local Guide to get the place added.
The minimum requirements are:
- Business Name
- Category
- Physical address
- Location on the map
Place can be added with the above data even in the absence of rest other like Located within, Photos, Business hours.
Hope your query is addressed.
Keep building informed community stronger 
together.
JAI HO!!!