diff --git a/common/filter-tags/README.md b/common/filter-tags/README.md
index 033701f..5f19e92 100644
--- a/common/filter-tags/README.md
+++ b/common/filter-tags/README.md
@@ -28,7 +28,7 @@ Creates all kinds of filters tags patterns depending of the monitor type and dir
 | Name | Description | Type | Default | Required |
 |------|-------------|:----:|:-----:|:-----:|
 | environment | Architecture Environment | string | - | yes |
-| extra_tags | Extra optional tags | list | `<list>` | no |
+| extra_tags | Extra optional tags (i.e. ["tag1:val1", "tag2:val2"]) | list | `<list>` | no |
 | filter_tags_custom | Tags used for custom filtering when filter_tags_use_defaults is false | string | `*` | no |
 | filter_tags_use_defaults | Use default filter tags convention | string | `true` | no |
 | resource | The dedicated tag for the resource | string | - | yes |
diff --git a/common/filter-tags/inputs.tf b/common/filter-tags/inputs.tf
index 82d5192..3e5abad 100644
--- a/common/filter-tags/inputs.tf
+++ b/common/filter-tags/inputs.tf
@@ -19,9 +19,7 @@ variable "filter_tags_custom" {
 }
 
 variable "extra_tags" {
-  description = "Extra optional tags"
+  description = "Extra optional tags (i.e. [\"tag1:val1\", \"tag2:val2\"])"
   type        = "list"
   default     = []
-
-  # Example of value to add optional tags : ["tag1:val1", "tag2:val2"]
 }