diff --git a/.generator/schemas/v2/openapi.yaml b/.generator/schemas/v2/openapi.yaml
index 4980e3a1bd22..9e009bb5a54f 100644
--- a/.generator/schemas/v2/openapi.yaml
+++ b/.generator/schemas/v2/openapi.yaml
@@ -16546,10 +16546,12 @@ components:
       properties:
         completed_date:
           description: Timestamp of when the maintenance was completed.
+          example: "2026-02-18T19:51:13.332360075Z"
           format: date-time
           type: string
         completed_description:
           description: The description shown when the maintenance is completed.
+          example: "We have completed maintenance on the API to improve performance."
           type: string
         components_affected:
           description: The components affected by the maintenance.
@@ -16558,12 +16560,15 @@ components:
           type: array
         in_progress_description:
           description: The description shown while the maintenance is in progress.
+          example: "We are currently performing maintenance on the API to improve performance."
           type: string
         scheduled_description:
           description: The description shown when the maintenance is scheduled.
+          example: "We will be performing maintenance on the API to improve performance."
           type: string
         start_date:
           description: Timestamp of when the maintenance is scheduled to start.
+          example: "2026-02-18T19:21:13.332360075Z"
           format: date-time
           type: string
         title:
@@ -16573,6 +16578,11 @@ components:
       required:
         - components_affected
         - title
+        - completed_date
+        - completed_description
+        - scheduled_description
+        - start_date
+        - in_progress_description
       type: object
     CreateMaintenanceRequestDataAttributesComponentsAffectedItems:
       description: A component affected by a maintenance.
diff --git a/lib/datadog_api_client/v2/models/create_maintenance_request_data_attributes.rb b/lib/datadog_api_client/v2/models/create_maintenance_request_data_attributes.rb
index 1f8733f3f218..af32081d1d96 100644
--- a/lib/datadog_api_client/v2/models/create_maintenance_request_data_attributes.rb
+++ b/lib/datadog_api_client/v2/models/create_maintenance_request_data_attributes.rb
@@ -22,22 +22,22 @@ class CreateMaintenanceRequestDataAttributes
     include BaseGenericModel
 
     # Timestamp of when the maintenance was completed.
-    attr_accessor :completed_date
+    attr_reader :completed_date
 
     # The description shown when the maintenance is completed.
-    attr_accessor :completed_description
+    attr_reader :completed_description
 
     # The components affected by the maintenance.
     attr_reader :components_affected
 
     # The description shown while the maintenance is in progress.
-    attr_accessor :in_progress_description
+    attr_reader :in_progress_description
 
     # The description shown when the maintenance is scheduled.
-    attr_accessor :scheduled_description
+    attr_reader :scheduled_description
 
     # Timestamp of when the maintenance is scheduled to start.
-    attr_accessor :start_date
+    attr_reader :start_date
 
     # The title of the maintenance.
     attr_reader :title
@@ -125,11 +125,36 @@ def initialize(attributes = {})
     # @return true if the model is valid
     # @!visibility private
     def valid?
+      return false if @completed_date.nil?
+      return false if @completed_description.nil?
       return false if @components_affected.nil?
+      return false if @in_progress_description.nil?
+      return false if @scheduled_description.nil?
+      return false if @start_date.nil?
       return false if @title.nil?
       true
     end
 
+    # Custom attribute writer method with validation
+    # @param completed_date [Object] Object to be assigned
+    # @!visibility private
+    def completed_date=(completed_date)
+      if completed_date.nil?
+        fail ArgumentError, 'invalid value for "completed_date", completed_date cannot be nil.'
+      end
+      @completed_date = completed_date
+    end
+
+    # Custom attribute writer method with validation
+    # @param completed_description [Object] Object to be assigned
+    # @!visibility private
+    def completed_description=(completed_description)
+      if completed_description.nil?
+        fail ArgumentError, 'invalid value for "completed_description", completed_description cannot be nil.'
+      end
+      @completed_description = completed_description
+    end
+
     # Custom attribute writer method with validation
     # @param components_affected [Object] Object to be assigned
     # @!visibility private
@@ -140,6 +165,36 @@ def components_affected=(components_affected)
       @components_affected = components_affected
     end
 
+    # Custom attribute writer method with validation
+    # @param in_progress_description [Object] Object to be assigned
+    # @!visibility private
+    def in_progress_description=(in_progress_description)
+      if in_progress_description.nil?
+        fail ArgumentError, 'invalid value for "in_progress_description", in_progress_description cannot be nil.'
+      end
+      @in_progress_description = in_progress_description
+    end
+
+    # Custom attribute writer method with validation
+    # @param scheduled_description [Object] Object to be assigned
+    # @!visibility private
+    def scheduled_description=(scheduled_description)
+      if scheduled_description.nil?
+        fail ArgumentError, 'invalid value for "scheduled_description", scheduled_description cannot be nil.'
+      end
+      @scheduled_description = scheduled_description
+    end
+
+    # Custom attribute writer method with validation
+    # @param start_date [Object] Object to be assigned
+    # @!visibility private
+    def start_date=(start_date)
+      if start_date.nil?
+        fail ArgumentError, 'invalid value for "start_date", start_date cannot be nil.'
+      end
+      @start_date = start_date
+    end
+
     # Custom attribute writer method with validation
     # @param title [Object] Object to be assigned
     # @!visibility private