Minecraft wiki entry for playanimation, associated text: Must be a string. And it must be either a single word (no spaces) or a quoted string.
Should be an animation name (e.g. animation.wolf.angry), or an animation defined under the Json path "minecraft:client_entity"."animations" in the <a_resource_pack>/entity/<entity_name>.entity.json file (e.g. wolf_angry for only wolf entity).
Specifies an animation to play now.
⚠️Warning: Never add .v1.0 to the end of an animation name because it generates many molang errors while the animation is running, causing the game to lag and possibly crash.