It seems that a user token (tied to my global admin account) with read permissions can’t see the same list of topics that show up when I check my assignments
GET https://example.com/notifications?limit=30&recent=true&filter_by_types=assigned&silent=true will get that exact list.
Maybe your integration is using GET https://example.com/topics/messages-assigned/username.json, which supports a direct parameter that can be true for only your own assignments and false for group assignments to be included.
When I try notifications?limit=30&recent=true&filter_by_types=assigned&silent=true against my own domain, I get a 404.
My naïve first try was just giving the AI the URL to my assignments: Profile - ganncamp - Sonar Community and even with a read token from me, it came up empty