Let's consider under what clause the auditor could write the non-conformance - and then establish a defence against it.
There are possibilities for a N/C under "7.5.2 When creating and updating documented information, the organization shall ensure appropriate:
a) identification and description (e.g. a title, date, author, or reference number);".
So, is the identification and description on the tag appropriate?
Another possibility is under "8.1e) determining, maintaining and retaining documented information to the extent necessary:
1) to have confidence that the processes have been carried out as planned;
2) to demonstrate the conformity of products and services to their requirements."
So, does the information on the tag demonstrate that the process has been carried out as planned and does it demonstrate conformity of the product?
Also consider 8.5.2 "The organization shall use suitable means to identify outputs when it is necessary to ensure the conformity of products and services."
Is the tag 'suitable means'?
And "8.6 The organization shall retain documented information on the release of products and services. The documented information shall include:
a) evidence of conformity with the acceptance criteria;
b) traceability to the person(s) authorizing the release."
So long as the tag demonstrates this, you're fine.
Just examples of where the auditor could raise N/Cs, but challenge any auditor who comments about empty boxes.