It's a half-baked, rushed out, speculative attempt to capture developer mindshare and establish an ecosystem/moat early in a (perceived) market. It's a desperate "standard" muscled in by Amazon/Claude, similar to their overwrought "Smithy" IDL that basically nobody outside the Amazon SDK team chooses to use for API/Schema management. It will end up in that same niche in the long term, most likely... AWS/Amazon/Claude specific app integrations, buried underneath some other 3rd party framework that abstracts it away and makes the "spec" irrelevant.
As long as MCP "just works" (and it does) and is relatively simple enough, then simply by being first, rather than being best, is what made it successful.
It's already gone so viral it's practically entrenched already, permanently. Everyone has invested too much time saying how much they love MCP. If we do find something cleaner it will still be called MCP, and it will be considered a 'variation' (new streaming approach maybe) on MCP rather than some competitor protocol replacing it. Maybe it will be called 'MCP 2.0' but it will be mostly the same and retain the MCP name for decades to come, I think.
MCP and Smithy aren’t comparable. Smithy is an internal tool used by almost every single team (it is used far, far more widely than just the SDK teams) at Amazon to define APIs and generate API servers/clients. It was released publicly because “why not?”, but I assure you that Amazon doesn’t care if you use it or not.
