diff --git a/variables.tf b/variables.tf
index b8dce52..6c7494c 100644
--- a/variables.tf
+++ b/variables.tf
@@ -19,20 +19,20 @@ variable "context" {
 variable "s3_kms_key_arn" {
   type        = string
   default     = null
-  description = "TODO"
+  description = "The ARN of the KMS key used for S3 server-side encryption."
   nullable    = true
 }
 
 variable "default_root_object" {
   type        = string
   default     = "index.html"
-  description = "TODO"
+  description = "The default root object for the S3 bucket, typically used for web hosting."
   nullable    = true
 }
 
 variable "cname_aliases" {
   type        = set(string)
   default     = null
-  description = "TODO"
+  description = "A set of CNAME aliases for the S3 bucket."
   nullable    = true
 }