Which command allows confirmation that requirements for annotating Personal Identifiable Information (PII) have been met?

The command that allows confirmation that requirements for annotating Personal Identifiable Information (PII) have been met is the one that provides detailed information about the table's properties, including any annotations related to PII.

The "DESCRIBE EXTENDED" command offers a comprehensive overview of the table's structure and its metadata, including detailed attributes that indicate how the table handles sensitive information such as PII. This command reveals information like the schema, data types, and relevant table properties, which often include PII annotations or sensitivities attached to the fields of the table.

In contrast, "DESCRIBE DETAIL" provides a richer set of details compared to the standard DESCRIBE command but may not specifically highlight PII requirements in its output. "SHOW TBLPROPERTIES" presents only the properties associated with the table without the extensive metadata context provided by the extended description. "DESCRIBE HISTORY" focuses on the historical changes made to the table rather than its current PII annotations or requirements.

Thus, "DESCRIBE EXTENDED" is the most suitable choice for confirming compliance with PII requirements due to its ability to show detailed metadata, including any specific annotations that demonstrate how PII is managed within the table structure.