Entity Declaration Completeness

Structure does not create reputation, but the absence of it guarantees a system has to guess, and systems guess badly about small properties.

Measures
Schema coverage across page types, presence and validity of federation endpoints, defined term sets, and declared relationships between records.
Data Source
The property's own rendered output and published endpoints.
Indicates
How legible the property is: how much a system has to infer versus how much it is told.
What Moves It
Building structure in from the first page. Retrofitting it onto a large site is considerably more work.
Does Not Prove
That anything will use the declarations, or that being legible produces citations. It removes ambiguity, nothing more.
Status
Measured directly. It is the one authority-adjacent signal fully inside the owner's control.

The trap here is depth that impresses at a glance and falls apart on inspection. A four hundred term glossary where most entries are one line of filler is not a strong declaration. It converts the property's best argument into evidence against it.