diff --git a/crates/tools/src/lib.rs b/crates/tools/src/lib.rs
index b8be582467..947373cdf2 100644
--- a/crates/tools/src/lib.rs
+++ b/crates/tools/src/lib.rs
@@ -559,4 +559,10 @@ mod tests {
             "Failed to validate input: missing required field 'path'"
         );
     }
+
+    #[test]
+    fn tool_error_missing_field_constructor() {
+        let err = ToolError::missing_field("my_field");
+        assert!(matches!(err, ToolError::MissingField { field } if field == "my_field"));
+    }
 }