It's the season for EoM (Evaluation of Materials) where students have to select a source and explain how it is useful and reliable for their project.
A common problem is that much of the EoM is devoted to descriptions. For example, students make the mistake of describing the achievements and accolades of an author to establish reliability. While that might be acceptable for informal communication, it falls short of thorough analysis and evaluation.
Instead, I pushed students to be precise with their definitions. The strategy is to reduce the point to a single word - key terms. For example, the author is reliable because of the relevant expertise, significant achievements and contextual experience. It forces clarity on the students' part. With clarity comes focus, purpose and force that is likewise expressed in their writing.