diff --git a/sas/defaults.tf b/sas/defaults.tf
new file mode 100644
index 0000000..ab5a4e9
--- /dev/null
+++ b/sas/defaults.tf
@@ -0,0 +1,7 @@
+locals {
+  _defaults = {
+    name              = "m-sas"
+    description       = "Security group for SAS"
+    short_description = "SAS"
+  }
+}
diff --git a/sas/settings.tf b/sas/settings.tf
index c581597..ffe1549 100644
--- a/sas/settings.tf
+++ b/sas/settings.tf
@@ -1,7 +1,7 @@
 locals {
-  name              = var.name != "" ? var.name : "m-sas"
-  is_modular        = length(regexall("^m-", var.name)) > 0
-  enable_self       = var.enable_self ? ! local.is_modular : var.enable_self
-  description       = var.description != "" ? var.description : format("Security Group for %v", local.name)
-  short_description = var.short_description != "" ? var.short_description : local.name
+  name              = var.name != "" ? var.name : local._defaults["name"]
+  is_modular        = var.name == "" || length(regexall("^m-", var.name)) > 0
+  enable_self       = var.enable_self ? ! local.is_modular : false
+  description       = var.description != "" ? var.description : local._defaults["description"]
+  short_description = var.short_description != "" ? var.short_description : local._defaults["short_description"]
 }