MCP really isn't aging well, to be honest. LLMs are just way more efficient at writing a single script that targets an API directly, rather than ping-ponging across a protocol that's inherently slow and token-heavy. Not saying MCP is bad, just that it's obviously not the silver bullet everyone thought it was.

Cloudflare letting the LLM write a single JS function to execute the whole chain in an edge isolate is super smart. It finally offloads the agent's inner loop.

I’ve been dealing with the exact same latency/reliability mess, but on the frontend. We ended up building an open protocol to let agents operate live UIs natively because vision and DOM-scraping loops are just painfully slow. Moving the actual execution engine as close to the target as possible (either an edge V8 isolate for APIs, or a native SDK for the frontend) seems to be the only real way out of the current "slow and expensive" agent phase.