Cannot Find My Agent Built with Agent Builder

Be mindful in the platform site: your assets may be scoped to a project.

Observe at upper-left in the platform site that you have selected the correct hierarchy of both organization and project.

Then verify in API use that you have not switched to a different environment key being used on the API.

A vector store that is accessible by API, can list its files, but that file listing is not populated as expected is unusual - but not completely unusual given the low reliability that vector stores in general has presented.