There is a command group 'az_role_definition'. This group of commands could 'manage role definitions'. The group of commands has global parameter '--debug' which means 'Increase logging verbosity to show all debug logs.'. The group of commands has global parameter '--help -h' which means 'Show this help message and exit.'. The group of commands has global parameter '--only-show-errors' which means 'Only show errors, suppressing warnings.'. The group of commands has global parameter '--output -o' which means 'Output format.'. The group of commands has global parameter '--query' which means 'JMESPath query string. See <a href="http://jmespath.org/">http://jmespath.org/</a> for more information and examples.'. The group of commands has global parameter '--subscription' which means 'Name or ID of subscription. You can configure the default subscription using `az account set -s NAME_OR_ID`.'. The group of commands has global parameter '--verbose' which means 'Increase logging verbosity. Use --debug for full debug logs.'. This group contains a child command 'az_role_definition_create'.The syntax is: az role definition create --role-definition. The 1th example of the child command would be to use it to 'create a role with read only access to storage and network resources  and the ability to start or restart vms   bash', the syntax is: az role definition create --role-definition '{
    "Name": "Contoso On-call",
    "Description": "Perform VM actions and read storage and network information.",
    "Actions": [
        "Microsoft.Compute/*/read",
        "Microsoft.Compute/virtualMachines/start/action",
        "Microsoft.Compute/virtualMachines/restart/action",
        "Microsoft.Network/*/read",
        "Microsoft.Storage/*/read",
        "Microsoft.Authorization/*/read",
        "Microsoft.Resources/subscriptions/resourceGroups/read",
        "Microsoft.Resources/subscriptions/resourceGroups/resources/read",
        "Microsoft.Insights/alertRules/*",
        "Microsoft.Support/*"
    ],
    "DataActions": [
        "Microsoft.Storage/storageAccounts/blobServices/containers/blobs/*"
    ],
    "NotDataActions": [
        "Microsoft.Storage/storageAccounts/blobServices/containers/blobs/write"
    ],
    "AssignableScopes": ["/subscriptions/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"]
}'. The 2th example of the child command would be to use it to 'create a role from a file containing a json description', the syntax is: az role definition create --role-definition @ad-role.json. The parameter '--role-definition' is required. It is used to description of a role as json, or a path to a file containing a json description.. 