Importing Records - How can I verify object and field structure before an import process

I have a new application which was developed by a Knack developer. I am ready to start testing. Before I start testing, I need to ensure my legacy database structure is compatible with the Knack app's object and field structure.

I am looking for a way to get a report from Builder to show me the structure of my objects and fields. Specifically I need to know the field types and characteristics like field character size. I plan to use this information to make sure that data from a legacy Filemaker Pro database matches the new field structure in our Knack app's schema.

Can I get this information in a report and if so, how?