MediaWiki:Apihelp-managetags-param-operation

Which operation to perform:

create

Create a new change tag for manual use.

delete

Remove a change tag from the database, including removing the tag from all revisions, recent change entries and log entries on which it is used.

activate

Activate a change tag, allowing users to apply it manually.

deactivate

Deactivate a change tag, preventing users from applying it manually.