How to call in langgraph the tools which previously customized in langchain using BaseModel and BaseTool?

[guapia233]

The custom tool is as follows (the image is highlighted in red because I removed some parts of the function for screenshots, so please ignore it) :

Define the agent node in langgraph as follows (wrong feeling)

The error is as follows:
TypeError: Object of type 'ModelMetaclass' is not JSON serializable
or
TypeError: _run() missing 2 required positional arguments: 'self' and 'network_segment'