📝Job roles are a good tool to quickly establish context in communication

Job titles are a tool to quickly establish context. However, roles might be a better tool for this.

A properly defined role (see Clarifying roles) gives you a lot of information to establish the context and know what to expect (role’s purpose, responsibilities, and domains of control). Implicitly defined roles give quite a bit of information too, and you can probably intuit what the role is about. (Job titles may suffer from being too vague and detached from person’s actual responsibilities.)