Answer: ALTER TAG, DROP TAG

The question asks for DDL commands specifically for managing tags in Snowflake. According to Snowflake documentation and the community discussion consensus (with AC having 100% agreement and upvoted comments), ALTER TAG (A) and DROP TAG (C) are valid DDL commands for tag management. DESCRIBE TAG (B) does not exist in Snowflake's DDL for tags. GRANT [privilege] ... TO TAG (D) and GRANT TAG (E) are Data Control Language (DCL) commands, not DDL, which are used for permission management rather than structural definition or modification of database objects like tags.

Author: LeetQuiz Editorial Team