[TeMPOraL]

No, you can't understand it until you understand that the world isn't all webshit and not everything is best used via REST.

(Not even webshit is best used by REST, as evidenced by approximately every "REST" API out there, designed as RPC over HTTP pretending it's not.)

[freeone3000]

Nevertheless, MCP is a “webshit” protocol (even in stdio mode), so if web protocols are unsuitable for your problem, MCP would be as well.