How to create fallbacks for agents in case some MCP servers (providing tools) cannot be reached?

I had a remote server down (e.g localhost:8000), and it prevented the MCP client from being used. To reproduce: ```python import asyncio from langchain_mcp_adapters.client import MultiServerMCPClient server_configs = { "deepwiki": {'url': 'https://mcp.deepwiki.com/mcp', 'transport': 'streamable_http'}, "dummy": {'url': 'http://localhost:8000/mcp/','transport': 'streamable_http'} } client = MultiServerMCPClient(server_configs) tools = await client.get_tools() ``` How should this be handled?