Update

Updates an Agent's name, source_type, agent_type, or owner_id. Omitted fields keep their values. Changing or clearing owner_id additionally requires workspaces:manage; assigning an owner also requires workspaces:read and active workspace membership. Fleet ownership cannot be changed through this endpoint. Changing agent_type requires workspaces:manage in addition to project update access; repeating the current type is a no-op. Source type can change only for an EXTERNAL Agent without runtime bindings. The id is immutable and is rejected when present. Requires update permission on every environment project.