Every
path is the file’s full path relative to the workspace root, exactly as
uploaded: never a bare file name, a folder, a file id, or a path that starts
with the workspace id. See File paths.
The id-based file metadata response includes source properties in file and
native_metadata, an overall summary, and documents[] and sheets[] with
their own summaries and categories. Each level carries keywords: string[]
and keyword_descriptions: [{keyword, description}].
description is null when the source does not establish the keyword’s role.
Older ingests may have keywords without generated descriptions.