We recently switched to using jsonschema-tools and including common schemas via $ref pointers. In this process, it seems some description fields were not abstracted and can be confusing when read in dereferenced materialized context. E.g. the performer field in mediawiki/common has

user_edit_count:
  description: >
    The number of edits this user has made at the time this revision is created.
    Not present for anonymous users.

performer is included in many mediawiki schemas, including some that have nothing to do with revisions.

We should take a pass over existing common schemas and make sure all the field descriptions make sense in a general context.