User input limitations

Can only include letters, digits, and underscores.

Cannot be longer than 30 characters.

Cannot include special characters, non-English characters, or empty spaces.

Cannot include pipeline (|), equals (=), and exclamation mark (!).

To prevent formula injection, report strings starting with a plus (+), minus (-), or an at (@) character are prepended with an apostrophe ('). For example, @SUM(1+1) is converted to '@SUM(1+1).