When we talked about developing microservices with loosely coupled services in that architecture, the development team of that particular service takes end-to-end ownership of the service. So, it makes more sense to give them power to see and design their alert metrics for that service. Their own designed metrics gives them real and meaningful alerts. If the metrics are decided on and designed by the DevOps team, then they might not do justice with true visualization of what is happening inside the service. So, set up your monitoring platform in such a way that allows every microservices team to decide and design their alerts, metrics, and dashboards. Also, the DevOps team should be able to see the overall picture of the system.