Couple of notes on this

First, it matters how well the MCP is written; a well-written one won't be so massive

Secondly, different sessions should load different MCPs. Load only what is needed

Thirdly, if you're finding you need a dozen MCPs, you need to consolidate that into a single service that does the work and then presents a single, unified API (via MCP) to your agent

Finally, start using models with 1M context window limits. I really don't know how people can stand being stuck at a limit like 272K.