shared app directory, exists but inaccessible to my app

Hi Gregory, I think I have miss-understood a concept here. I create a app that has access across all my files on my dropbox and my app works. I create an app with limited access and I it doesn't. The app itself uses HTTP protocol, so calls much like the one above. After installation the app makes this call. 

https://www.dropbox.com/oauth2/authorize?client_id=ID&response_type=token&redirect_uri=https://www.dropbox.com/1/oauth2/redirect_receiver&disable_signup=true&state=" + String(token2Verify))

With a random token, it works and returns an access token I use. Later in the app I make a calls to this routine.

curl -X POST https://api.dropboxapi.com/2/sharing/list_shared_links  --header "Authorization: Bearer ab-CODE"  --header "Content-Type: application/json"  --data "{}"

And it returns nothing as you can see beyond a cursor suggesting there is more? This despite the fact that I have more than a 1000 files within directories in the app directory I named?

{"links": [], "has_more": true, "cursor": "cursor-CODE"}

I clearly missed a detail here? It works if I the app I create has access to all my files, but not if I restrict it to a directory?