The LDP specification introduces an IRI to be used to advertise any constraints on the ability of a client to create or update resources:

Link: <https://example.com/SpecificErrorCondition>; rel="http://www.w3.org/ns/ldp#constrainedBy"

If Solid published a common vocabulary of error conditions, this feature could potentially be used to accomplish a high level of interoperability across servers. Is such a recommendation within the scope of the Solid specification?