{} clears all tags.path idstringrequiredbody <tagKey>stringA–Z a–z 0–9 _ . - :. : is allowed as
a user namespace separator.oc: key prefix is reserved for future system-set tags.team=payments to team=growth will appear under growth in
every subsequent /usage query, including for time before the retag.
Surface tagsLastUpdatedAt alongside usage in dashboards so readers
can see when tags changed.1234{ "tags": { "env": "staging", "team": "growth" }, "tagsLastUpdatedAt": "2026-04-22T20:31:14Z" }