Table Summary Option as per Word and other apps
Could you add a tab in the ‘Table Options’ dialog window when selecting a table. This tab called Table Summary would be a field that allows you to add a brief description on what the table is about. The information would then carry over to a PDF when you export it.
An accessibility check on the PDF without a table summary produces a warning. Whilst tables summaries are not compulsory for accessibility, in order to get 100% compliance (green tick), tables summaries need to be added which Microsoft Word and other programs seem to do whereas Adobe Indesign does not.
The attached PDF further explains the request.