What is the MOST operationally efficient way for the SysOps administrator to meet these requirements?
Create a tag-based resource group in AWS Resource Groups.
Use AWS Trusted Advisor. Export the EC2 On-Demand Instances check results from Trusted Advisor.
Use Cost Explorer. Choose a service type of EC2-Instances, and group by Resource.
Use Tag Editor in AWS Resource Groups. Select all Regions, and choose a resource type of AWS::EC2::Instance.
Explanations:
AWS Resource Groups helps organize resources based on tags but does not display detailed tags for all EC2 instances across regions.
AWS Trusted Advisor focuses on best practices for cloud infrastructure, not specifically on displaying EC2 instance tags.
Cost Explorer groups by service cost, not by resource tags. It does not provide a list of EC2 instances and their tags.
Tag Editor in AWS Resource Groups allows the administrator to search across multiple regions, filter for EC2 instances, and display tags, which aligns with the requirement.
I systematize that the answer is:
Use Tag Editor in AWS Resource Groups. Select all Regions, and choose a resource type of AWS::EC2::Instance.