Defined in github.com/aws/aws-sdk-go/service/swf/api.go
The cause of the failure. This information is generated by the system and can be useful for diagnostic purposes.
If cause is set to OPERATION_NOT_PERMITTED, the decision failed because it lacked sufficient permissions. For details and example IAM policies, see Using IAM to Manage Access to Amazon SWF Workflows (http://docs.aws.amazon.com/amazonswf/latest/developerguide/swf-dev-iam.html).