Ask HN: Good references for oncall alert reference

In my organisation, everyone writes alert reference (handbook about how to fix an alert during oncall) in different way which creates frustration for oncall person. I am looking for a good template for alert reference. If you have any thoughts on it, kindly share please.

Problems: - They become big as the architecture gets complex. - They are mostly vague because noone knows all the possible causes of an alert.