singhpk234 commented on PR #13879:
URL: https://github.com/apache/iceberg/pull/13879#issuecomment-3874446451

   > do we have any guidance on how catalogs are supposed to deny access to 
untrusted engines
   
   catalogs can deny with a 403 if they want, if the question how does the 
catalog identifies if its a trusted engine or not imho its something between 
catalog and client, we discussed a bit about it in the DEFINER views 
discussions too, trust can be established by mTls / on behalf of flow using 
Oauth .... we just define an optional evaluated policy well defined structure 
which a catalog is free to fill if it trusts the client that it will enforce it 


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