diff --git a/README.org b/README.org
index ebb0d26..4dda837 100644
--- a/README.org
+++ b/README.org
@@ -610,7 +610,7 @@ DATE is the date or date range to match."
                             :description "Buffer name.")
                           '(:name "date"
                             :type string
-                            :description "Date in YYYY or YYYY-MM format."))
+                            :description "Date string in YYYY or YYYY-MM format. No <, >, [, ]. Just the numbers and dashes."))
               :category "org"))
 #+end_src
 
diff --git a/gptel-org-tools.el b/gptel-org-tools.el
index aa6c33a..ae7a997 100644
--- a/gptel-org-tools.el
+++ b/gptel-org-tools.el
@@ -228,7 +228,7 @@ DATE is the date or date range to match."
                             :description "Buffer name.")
                           '(:name "date"
                             :type string
-                            :description "Date in YYYY or YYYY-MM format."))
+                            :description "Date string in YYYY or YYYY-MM format. No <, >, [, ]. Just the numbers and dashes."))
               :category "org"))
 
 (defun gptel-org-tools--org-agenda-seek (days)