diff --git a/src/tools/filesystem.rs b/src/tools/filesystem.rs
index eb32657..57639da 100644
--- a/src/tools/filesystem.rs
+++ b/src/tools/filesystem.rs
@@ -111,7 +111,7 @@ impl Tool for ReadDir {
             identifier: "read_dir",
             description: "Read the content of a directory.",
             group: "filesystem",
-            inputs: vec![ValueType::String],
+            inputs: vec![ValueType::String, ValueType::Empty],
         }
     }