🧪 Add test for ToolError::invalid_input

This commit introduces a unit test for the `ToolError::invalid_input`
constructor to ensure it correctly maps to the `ToolError::InvalidInput`
variant with the expected message.

Co-authored-by: Hmbown <101357273+Hmbown@users.noreply.github.com>

Author: google-labs-jules[bot]

crates/tools/src/lib.rs

@@ -559,4 +559,13 @@ mod tests {
             "Failed to validate input: missing required field 'path'"
         );
     }
+
+    #[test]
+    fn tool_error_invalid_input_creates_correct_variant() {
+        let err = ToolError::invalid_input("test invalid message");
+        match err {
+            ToolError::InvalidInput { message } => assert_eq!(message, "test invalid message"),
+            _ => panic!("Expected ToolError::InvalidInput, got {:?}", err),
+        }
+    }
 }