Lazy HTTP connections seem to make error handling difficult.

streamablehttp_client エントリーポイントとその anyio.create_task_group のセットアップから開始し、asyncio.timeout と timeout=10 を使って到達不能なドメインの例を再現します。httpx.ConnectTimeout が session.initialize() および周囲のコンテキストマネージャーに対していつ表面化するかを追跡し、示されたケースについて、修正済みまたは文書化済みのエラー発生時点を完了の定義とします。

Question

When using streamablehttp_client, since HTTP connections are initialized with anyio.create_task_group, if the server is unreachable, an error will occur unexpectedly at some point later. Is this the intended behavior? If the connection is impossible, I want to wait and handle the error. However, the current behavior executes the code after the initialization and then throws an error at some point. If the error had occurred earlier, the code below it wouldn't have needed to execute. I consider this excessive optimization. Is there a reason for this design?

Additional Context

import asyncio
from langchain_mcp_adapters.tools import load_mcp_tools
from mcp import ClientSession
from mcp.client.streamable_http import streamablehttp_client

async def _init_and_load(session: ClientSession):
    try:
        async with asyncio.timeout(10): # << I cannot access the server and will time out.
            await session.initialize()
            return await load_mcp_tools(session)
    except Exception as e:
        return []

async def main():
    async with streamablehttp_client(url="https://some.unreachable.domain") as client:
        async with ClientSession(client[0], client[1]) as session:
            tools = await _init_and_load(session)
            await asyncio.sleep(100) # << A httpx.ConnectTimeout exception occurred while performing the following operation!!

import asyncio
from langchain_mcp_adapters.tools import load_mcp_tools
from mcp import ClientSession
from mcp.client.streamable_http import streamablehttp_client

async def _init_and_load(session: ClientSession):
    try:
        await session.initialize()
        return await load_mcp_tools(session)
    except Exception as e: # << Since the error is caused by tg, this cannot handle the error too!!
        return []

async def main():
    async with streamablehttp_client(url="https://some.unreachable.domain", timeout=10) as client:
        async with ClientSession(client[0], client[1]) as session:
            tools = await _init_and_load(session)
            await asyncio.sleep(100)