How can I add a field to a view description
I don't know that it will provide all the functionality you are looking for, but you could look into Views Field View:


  This module allows you to embed a view as a field in a view. A new
  field handler is made available, so this can also be used in area
  (header/footer/empty) handlers as well as rows.
  
  This view handler can accept arguments from fields of the parent view
  using tokens and pass them into the child view for each row. Raw or
  rendered token values can be used, as well as static values.