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):