From 18b83333d3d28ad0e02bf192459defdc353d8404 Mon Sep 17 00:00:00 2001
From: YISH <mokeyish@hotmail.com>
Date: Fri, 21 Jun 2024 23:45:20 +0800
Subject: [PATCH] Fix `observation?.includes is not a function` (#2696)

---
 packages/components/nodes/tools/CustomTool/core.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/packages/components/nodes/tools/CustomTool/core.ts b/packages/components/nodes/tools/CustomTool/core.ts
index 86addc6b1..786ad6f7d 100644
--- a/packages/components/nodes/tools/CustomTool/core.ts
+++ b/packages/components/nodes/tools/CustomTool/core.ts
@@ -96,6 +96,9 @@ export class DynamicStructuredTool<
             await runManager?.handleToolError(e)
             throw e
         }
+        if (result && typeof result !== 'string') {
+            result = JSON.stringify(result)
+        }
         await runManager?.handleToolEnd(result)
         return result
     }