If you want to try to implement a standard naming convention for people to follow, it would be very helpful for people to be able to easily remind themselves of what it is. If there was help text on a record name field, one could easily do this.
While help text on standard fields is "resolved"
, per Salesforce Support, you still can't create help text for a standard "record name" field (on a standard object or on a custom object).
According to Salesforce's explanation of help text for standard fields, it seems that one should be able to do this. They say: "Field-level help is not available for some standard fields, including fields on the User object, system read only fields, auto-number fields, multi-currency fields, Salesforce CRM Ideas fields, and Community fields."
The help desk response: The field that you are referring to does not apply to being able to do help text on. The reason for this, is that fields on custom objects that you create that are the main field to label the records do not have help text.