From 405fb3e18cfd27ddb53cc5507b74d2278932cd94 Mon Sep 17 00:00:00 2001
From: Justin Spahr-Summers <justin@anthropic.com>
Date: Thu, 7 Nov 2024 13:38:01 +0000
Subject: [PATCH] `CallToolResult.isError` should be optional

---
 mcp_python/types.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mcp_python/types.py b/mcp_python/types.py
index 4e8071918..ffcf75e00 100644
--- a/mcp_python/types.py
+++ b/mcp_python/types.py
@@ -641,7 +641,7 @@ class CallToolResult(Result):
     """The server's response to a tool call."""
 
     content: list[TextContent | ImageContent | EmbeddedResource]
-    isError: bool
+    isError: bool = False
 
 
 class ToolListChangedNotification(Notification):