diff --git a/plugin/service/host/plugin.go b/plugin/service/host/plugin.go
index bf7249a..bbf5aff 100644
--- a/plugin/service/host/plugin.go
+++ b/plugin/service/host/plugin.go
@@ -191,7 +191,7 @@ func (p *HostPlugin) OnUpdateCatalog(ctx context.Context, req *pb.OnUpdateCatalo
 			return nil, errors.BadRequestStatusf("error loading persisted state: %s", err)
 		}
 
-		// perform dry run to ensure we can interact with AWS as expected.
+		//  New: perform dry run to ensure we can interact with AWS as expected.
 		opts := []ec2Option{}
 		if newCatalogAttributes.DualStack {
 			opts = append(opts, WithDualStack(newCatalogAttributes.DualStack))
diff --git a/plugin/service/host/plugin_test.go b/plugin/service/host/plugin_test.go
index 2bf23d8..9e7de7f 100644
--- a/plugin/service/host/plugin_test.go
+++ b/plugin/service/host/plugin_test.go
@@ -742,6 +742,9 @@ func TestPluginOnCreateCatalogErr(t *testing.T) {
 					testMockEC2WithDescribeInstancesError(errors.New(testDescribeInstancesError)),
 				)),
 			},
+			// checkHosts returns the DescribeInstances error as-is rather than
+			// wrapping it in a gRPC FailedPrecondition status like the old
+			// dryRunValidation did. A plain Go error maps to codes.Unknown.
 			expectedErrContains: testDescribeInstancesError,
 			expectedErrCode:     codes.Unknown,
 		},
@@ -994,6 +997,9 @@ func TestPluginOnUpdateCatalogErr(t *testing.T) {
 					testMockEC2WithDescribeInstancesError(errors.New(testDescribeInstancesError)),
 				)),
 			},
+			// checkHosts returns the DesribeInstances errror as-is rather than wrapping it
+			// in a gRpc FailedPrecodndition status like the old dryRunValidiation did.
+			// A plain Go error maps to codeds.Unknown.
 			expectedErrContains: testDescribeInstancesError,
 			expectedErrCode:     codes.Unknown,
 		},
@@ -1036,6 +1042,9 @@ func TestPluginOnUpdateCatalogErr(t *testing.T) {
 					testMockEC2WithDescribeInstancesError(errors.New(testDescribeInstancesError)),
 				)),
 			},
+			// checkHosts returns the DescribeInstances error as-is rather than wrapping it
+			// in a gRPC FailedPrecondition status like the old dryRunValidiation did.
+			// A plain Go error maps to codes.Unknown.
 			expectedErrContains: testDescribeInstancesError,
 			expectedErrCode:     codes.Unknown,
 		},
@@ -1211,6 +1220,9 @@ func TestPluginOnUpdateCatalogErr(t *testing.T) {
 					testMockEC2WithDescribeInstancesError(fmt.Errorf("oops there was an error")),
 				)),
 			},
+			// checkHosts returns the DescribeInstances error as-is rather than wrapping it
+			// in a gRPC FailedPrecondition status like the old dryRunValidiation did.
+			// A plain Go error maps to codes.Unknown.
 			expectedErrContains: "oops there was an error",
 			expectedErrCode:     codes.Unknown,
 		},