diff --git a/go/vt/vtctl/vtctl.go b/go/vt/vtctl/vtctl.go
index 4f413717770..82aeb0ce5e2 100644
--- a/go/vt/vtctl/vtctl.go
+++ b/go/vt/vtctl/vtctl.go
@@ -316,7 +316,7 @@ var commands = []commandGroup{
 				"Start a Resharding process. Example: Reshard -cells='zone1,alias1' -tablet_types='master,replica,rdonly'  ks.workflow001 '0' '-80,80-'"},
 			{"MoveTables", commandMoveTables,
 				"[-cells=<cells>] [-tablet_types=<source_tablet_types>] -workflow=<workflow> <source_keyspace> <target_keyspace> <table_specs>",
-				`Move table(s) to another keyspace, table_specs is a list of tables or the tables section of the vschema for the target keyspace. Example: '{"t1":{"column_vindexes": [{"column": "id1", "name": "hash"}]}, "t2":{"column_vindexes": [{"column": "id2", "name": "hash"}]}}'`},
+				`Move table(s) to another keyspace, table_specs is a list of tables or the tables section of the vschema for the target keyspace. Example: '{"t1":{"column_vindexes": [{"column": "id1", "name": "hash"}]}, "t2":{"column_vindexes": [{"column": "id2", "name": "hash"}]}}'.  In the case of an unsharded target keyspace the vschema for each table may be empty. Example: '{"t1":{}, "t2":{}}'.`},
 			{"DropSources", commandDropSources,
 				"[-dry_run] [-rename_tables] <keyspace.workflow>",
 				"After a MoveTables or Resharding workflow cleanup unused artifacts like source tables, source shards and blacklists"},
@@ -1891,9 +1891,9 @@ func commandReshard(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.F
 }
 
 func commandMoveTables(ctx context.Context, wr *wrangler.Wrangler, subFlags *flag.FlagSet, args []string) error {
-	workflow := subFlags.String("workflow", "", "Workflow name. Will be used to later migrate traffic.")
+	workflow := subFlags.String("workflow", "", "Workflow name. Can be any descriptive string. Will be used to later migrate traffic via SwitchReads/SwitchWrites.")
 	cells := subFlags.String("cells", "", "Cell(s) or CellAlias(es) (comma-separated) to replicate from.")
-	tabletTypes := subFlags.String("tablet_types", "", "Source tablet types to replicate from.")
+	tabletTypes := subFlags.String("tablet_types", "", "Source tablet types to replicate from (e.g. master, replica, rdonly). Defaults to -vreplication_tablet_type parameter value for the tablet, which has the default value of replica.")
 	if err := subFlags.Parse(args); err != nil {
 		return err
 	}