diff --git a/internal/services/containers/container_registry_task_resource.go b/internal/services/containers/container_registry_task_resource.go
index fc6474b75cac..3c56e416e673 100644
--- a/internal/services/containers/container_registry_task_resource.go
+++ b/internal/services/containers/container_registry_task_resource.go
@@ -574,16 +574,19 @@ func (r ContainerRegistryTaskResource) Arguments() map[string]*pluginsdk.Schema
 			Elem: &pluginsdk.Resource{
 				Schema: map[string]*schema.Schema{
 					"cpu": {
-						Type:     pluginsdk.TypeInt,
-						Required: true,
+						Type:         pluginsdk.TypeInt,
+						Required:     true,
+						ValidateFunc: validation.IntInSlice([]int{2}),
 					},
 				},
 			},
+			ConflictsWith: []string{"agent_pool_name"},
 		},
 		"agent_pool_name": {
-			Type:         pluginsdk.TypeString,
-			Optional:     true,
-			ValidateFunc: validation.StringIsNotEmpty,
+			Type:          pluginsdk.TypeString,
+			Optional:      true,
+			ValidateFunc:  validation.StringIsNotEmpty,
+			ConflictsWith: []string{"agent_setting"},
 		},
 		"enabled": {
 			Type:     pluginsdk.TypeBool,
diff --git a/website/docs/r/container_registry_task.html.markdown b/website/docs/r/container_registry_task.html.markdown
index 18d262f3d757..58e396428e0e 100644
--- a/website/docs/r/container_registry_task.html.markdown
+++ b/website/docs/r/container_registry_task.html.markdown
@@ -55,6 +55,8 @@ The following arguments are supported:
 
 * `agent_setting` - (Optional) A `agent_setting` block as defined below.
 
+~> **NOTE:** Only one of `agent_pool_name` and `agent_setting` can be specified.
+
 * `enabled` - (Optional) Should this Container Registry Task be enabled? Defaults to `true`.
 
 * `identity` - (Optional) An `identity` block as defined below.
@@ -93,7 +95,7 @@ The following arguments are supported:
 
 A `agent_setting` block supports the following:
 
-* `cpu` - (Required) The number of cores required for the Container Registry Task.
+* `cpu` - (Required) The number of cores required for the Container Registry Task. Possible value is `2`.
 
 ---