diff --git a/changelog/4034.changed.md b/changelog/4034.changed.md
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+- MCPClient now requires async with MCPClient(...) as mcp: or explicit start()/close() calls to manage the connection lifecycle.
diff --git a/changelog/4034.fixed.md b/changelog/4034.fixed.md
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+- Fixed MCPClient opening a new connection for every tool call instead of reusing the session.