AWS Step Functions now enables access to metadata about workflow executions so that you can easily identify related resources. For example, your workflow can retrieve its execution ID or a timestamp indicating when a task started. This makes it easier to correlate logs for faster debugging and to measure workflow performance data. Your workflows pass metadata to tasks by referencing a context object available with each workflow execution.  

from Recent Announcements https://aws.amazon.com/about-aws/whats-new/2019/05/aws_step_functions_enables_access_to_workflow_metadata/