Probably not. A delegate will be able to verify (or cancel) your authorship on your publications, and will be able to upload papers to eScholarship on your behalf (more information below). In general, library staff are not able to act as delegates: library staff do not have enough familiarity with faculty members' publication histories to be able to verify authorship; nor do library staff have access to author manuscript files for upload to eScholarship. If you want to assign a delegate, it should be someone who is intimately familiar with your work – for instance, you may want to give your assistant or a departmental administrator access to your account. Students cannot be assigned as delegates.