diff --git a/docs/resources/corp_signal_tag.md b/docs/resources/corp_signal_tag.md
index 188186a..e5b576f 100644
--- a/docs/resources/corp_signal_tag.md
+++ b/docs/resources/corp_signal_tag.md
@@ -24,7 +24,7 @@ resource "sigsci_corp_signal_tag" "test" {
 
 ### Required
 
-- `short_name` (String) The display name of the signal tag
+- `short_name` (String) The display name of the signal tag. Must be 3-25 char.
 
 ### Optional
 
diff --git a/docs/resources/site_signal_tag.md b/docs/resources/site_signal_tag.md
index 1b95055..cd353a7 100644
--- a/docs/resources/site_signal_tag.md
+++ b/docs/resources/site_signal_tag.md
@@ -25,7 +25,7 @@ resource "sigsci_site_signal_tag" "test" {
 
 ### Required
 
-- `name` (String) The display name of the signal tag
+- `name` (String) The display name of the signal tag. Must be 3-25 char.
 - `site_short_name` (String) Site short name
 
 ### Optional