How can I describe auth/aws/role

When I write a role using write auth/aws/role/role-name, in future I can only list these roles. I also want to describe them and view their properties too but I am unable to find such command.

You can use standard vault list/read against them.

$ vault list auth/aws/role
Keys
----
dev-role
test-role

$ vault read auth/aws/role/dev-role
Key                               Value
---                               -----
allow_instance_migration          false
auth_type                         ec2
bound_account_id                  []