langgraph调用sse，报错。但是调用stdio没问题

WARNING:root:Failed to validate notification: 13 validation errors for ServerNotification
CancelledNotification.method
Input should be 'notifications/cancelled' [type=literal_error, input_value='sse/connection', input_type=str]
For further information visit https://errors.pydantic.dev/2.11/v/literal_error
CancelledNotification.params.requestId
Field required [type=missing, input_value={'message': 'SSE Connection established'}, input_type=dict]
For further information visit https://errors.pydantic.dev/2.11/v/missing
ProgressNotification.method
Input should be 'notifications/progress' [type=literal_error, input_value='sse/connection', input_type=str]
For further information visit https://errors.pydantic.dev/2.11/v/literal_error
ProgressNotification.params.progressToken
Field required [type=missing, input_value={'message': 'SSE Connection established'}, input_type=dict]
For further information visit https://errors.pydantic.dev/2.11/v/missing
ProgressNotification.params.progress
Field required [type=missing, input_value={'message': 'SSE Connection established'}, input_type=dict]
For further information visit https://errors.pydantic.dev/2.11/v/missing
LoggingMessageNotification.method
Input should be 'notifications/message' [type=literal_error, input_value='sse/connection', input_type=str]
For further information visit https://errors.pydantic.dev/2.11/v/literal_error
LoggingMessageNotification.params.level
Field required [type=missing, input_value={'message': 'SSE Connection established'}, input_type=dict]
For further information visit https://errors.pydantic.dev/2.11/v/missing
LoggingMessageNotification.params.data
Field required [type=missing, input_value={'message': 'SSE Connection established'}, input_type=dict]
For further information visit https://errors.pydantic.dev/2.11/v/missing
ResourceUpdatedNotification.method
Input should be 'notifications/resources/updated' [type=literal_error, input_value='sse/connection', input_type=str]
For further information visit https://errors.pydantic.dev/2.11/v/literal_error
ResourceUpdatedNotification.params.uri
Field required [type=missing, input_value={'message': 'SSE Connection established'}, input_type=dict]
For further information visit https://errors.pydantic.dev/2.11/v/missing
ResourceListChangedNotification.method
Input should be 'notifications/resources/list_changed' [type=literal_error, input_value='sse/connection', input_type=str]
For further information visit https://errors.pydantic.dev/2.11/v/literal_error
ToolListChangedNotification.method
Input should be 'notifications/tools/list_changed' [type=literal_error, input_value='sse/connection', input_type=str]
For further information visit https://errors.pydantic.dev/2.11/v/literal_error
PromptListChangedNotification.method
Input should be 'notifications/prompts/list_changed' [type=literal_error, input_value='sse/connection', input_type=str]
For further information visit https://errors.pydantic.dev/2.11/v/literal_error. Message was: method='sse/connection' params={'message': 'SSE Connection established'} jsonrpc='2.0'

    client = MultiServerMCPClient(
        {
            "VchartCalculator": {
                "url": "http://192.168.2.57:13001/sse",
                "transport": "sse"
            }
        }
    )
    # 从远程MCP服务获取tools
    tools = await client.get_tools()
    print(tools)

尝试删除这段代码后，正常。