MCP Solves Tools, Not Memory

The post is right, but the critique is aimed at the wrong layer. MCP standardizes tool access; it was never meant to be a memory substrate, so “stateless by default” is a feature, not a bug.

• –Persistent memory needs an explicit store, retrieval policy, and write rules; MCP alone won’t infer what should survive between sessions
• –Most teams end up with some mix of session stitching, vector search, structured user profiles, or task memory tables
• –The hard part is not storing context, it’s deciding what to keep, when to refresh it, and how to avoid stale or polluted memory
• –For agentic apps, this pushes memory into product architecture, not protocol design
• –The practical takeaway: MCP is a transport and tooling layer, while memory remains an app-specific responsibility