Well, for Social Security, it would have to be established that she has been or will be unable to work for 12 months or longer. How long did she last at her last several jobs? How much time did she take off work? How was her peformance in comparison to other employees?

And if SSA asks, which they should, you need to be able to explain exactly what "not very much" means. Specifically, what does she do from the time she gets up in the morning until she goes to bed? What is she no longer able to do that she used to be able to do and who does it for her? And how much better does she feel with the medication?

These kinds of details will be used by SSA to determine how severe her agoraphobia is and how long it will prevent her from being able to hold a job.