Truly, S in MCP stands for Security!
The S in SSH?
The S in HTTPS?
The S in MCP?
All stand for the same thing!
I remember when this joke was first applied to IoT.
Given how old FTP and HTTP are it's fairly understandable that they weren't initially designed with security in mind, but I think it's valid to question why we're still designing insecure systems in 2025.