https://github.com/openai/openai-cookbook/discussions

[Rastakhcarbon]

Title: Strategic Gap: Custom HTTP MCP Tool Discovery in Agent Builder
Content:
Is there an official timeline for enabling full tool discovery (tools/list) for custom HTTP MCP servers within the Agent Builder UI?
Currently, the handshake completes but discovery is bypassed, blocking enterprise-grade custom MCP deployments that rely on the visual builder. Since this works on the Responses API, we are looking for clarification if this UI limitation is intentional or a temporary roadmap item.