On the top right corner of the Alert Definition, it is not showing the proper metric name.
For example: Instead of showing "Memory" the metric is showing as Application / Capacity
VMware Aria Operations 8.x
No cause. This is configured by design.
On each alert, there are a subset of pre-defined attributes, such as the Type, Sub Type, and Criticality. These are configured as a high level categorization for each Alert Definitions.
Please refer to following reference for additional details on Alert Definitions:
Understanding Alerts in VMware Aria Operations