MCP Is Not Replacing REST. It Is Replacing the Entire Mental Model of How Agents Use Tools.

Short summary

MCP (Model Context Protocol) is not replacing REST at the HTTP level — it is replacing the mental model of how AI agents discover and invoke tools. Unlike REST's request-response pattern, MCP is session-oriented: servers advertise capabilities, models discover them dynamically, and state persists across multi-step tasks. This solves real production problems like schema drift, hallucinated parameters, and the fragile glue code between LLMs and services.

• •MCP is a session-oriented protocol where agents discover and negotiate tools dynamically
• •Solves REST-based agent failures: schema drift, hallucinated params, lost context mid-task
• •Enables multi-tenant platforms to serve different tool sets per session without prompt rewriting

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