diff --git a/src/memory/README.md b/src/memory/README.md
index f56252a06c..b7e971d000 100644
--- a/src/memory/README.md
+++ b/src/memory/README.md
@@ -114,7 +114,7 @@ Example:
 
 - **search_nodes**
   - Search for nodes based on query
-  - Input: `query` (string)
+  - Input: `query` (string, at most 2048 characters; a longer query is rejected)
   - Searches across:
     - Entity names
     - Entity types