Yeah that but - Why SSE? - Why JsonRPC - Why Statefulness

REST based Tool Call Server would work 100% fine. Now auth have to be redone for those specifically.

And for users of MCP Tools - they are sending a lot of their information to whatever service they are running - that they have never control of

For developer it is not necessary and security nightmare if you use someone's MCP service or run your own.

For users , it is a privacy nightmare .