docs: Add note about required fields

website/content/docs/concepts/host-discovery/gcp.mdx

@@ -77,6 +77,8 @@ Complete the following steps to create a dynamic host catalog for GCP:
     - **Type**: (Required) Select **Dynamic** to create a dynamic host catalog.
     - **Provider**: (Required) Select **GCP** to create a dynamic host catalog for your GCP resources.
 
+      The required fields for creating a dynamic host catalog depend on the type of authentication you configure.
+
     <Tabs>
     <Tab heading="Service account" group="account">
 
@@ -141,6 +143,8 @@ Complete the following steps to create a dynamic host catalog for GCP:
 
 <Tab heading="CLI" group="cli">
 
+The required fields for creating a dynamic host catalog depend on the type of authentication you configure.
+
 <Tabs>
 <Tab heading="Service account" group="account">
 
@@ -255,6 +259,8 @@ Complete the following steps to create a dynamic host catalog for GCP:
 
 <Tab heading="Terraform" group="terraform">
 
+The required fields for creating a dynamic host catalog depend on the type of authentication you configure.
+
 <Tabs>
 <Tab heading="Service account" group="account">