Has tag
Whether an entity (a player too) has a tag, like boss.
A Minecraft element (a check) in Entities & mobs. Needs the Basic plan or higher to go live; building and testing are free.
Example
When a player kills a mob → If Has tag boss → Broadcast: The boss is down!
Also called
tagged, is marked
Works as a data pack?
Yes. A vanilla data pack does this exactly as the plugin does.
What you give it
- Entity
- Tag