Garry Tan says MCP "barely works" today

I see MCP as fundamentally limited: even if we had an LLM that knew how to use it perfectly, at the end of the day MCP workflows are integrations between many different APIs that were not designed to be composed and to work together.

What if $TOOL_X needs $DATA to be called, but $TOOL_Y only returns $DATA_SUBSET? What happens when $TOOL_Z fails mid-workflow, after $TOOL_W has already executed?

Remember that things a "ceo" of anything says is just what he hears from people he has talked to. Now it doesn't make it obviously wrong, it's just then begs the question who he has been talking to that week. I doubt gary is doing any of the coding these days. For what it's worth, it's completely fine to ignore what he is saying - no offense.