We are trying to leverage DT AI engine event correlation capability as central point for many of other monitoring tools such as; SevONE, SCOM, NetCool, ICINGA, OEM ETC
Does DT have integration mechanism for these tools to collect metrics/events so they can be used by DT AI engine for problem identification, RCA, event correlation ETC?
No. Not at the moment. Albeit this is technically possible. it basically boils down to properly sending events to correct entities in Dynatrace and of a correct type. This sounds easy, but each monitoring tool has different concepts and entity types. Proper event integration between any monitoring tools is almost always a pain.
However, ingesting just a subset of clearly defined events seems possible, although I'm not sure if there is any benefit. Events in Dynatrace must be sent to an existing entity (Application/Service/Process/Host/...) and you can't create entities of those types (just custom devices). Also, I don't think it makes sense to run multiple monitoring tools on the same hosts and do an event integration. I'd consider a replacement of those legacy tools where Dynatrace is already in place.
Don't forget this event ingestion works only with AI2.0 which is not the default yet.
As Julius already mentioned, you can send in events to existing entities, such as host, services, etc. The mapping to an existing host should be pretty easy, while for the mapping onto a service you most likely will use a tag based approach.
The idea behind sending external events into Dynatrace is to provide some additional context information or more root cause info.
I agree that it does not make much sense to send in additional metrics or events that Dynatrace already collects and alerts on anyway.