MCP servers give the agent real tools — databases, browsers, payment APIs, your internal services. The right ones remove guesswork and let the agent act directly instead of asking you to.

Why it matters

MCP is a balance. The right servers make the agent dramatically more capable. Too many unused servers add tool-selection overhead and token cost to every prompt, because their tool definitions ride along whether you use them or not.

How to improve

Connect what you use. If you work with Stripe, a database, or a browser daily, those servers pay for themselves immediately.
Prune what you don’t. Disconnect servers you never call — they’re pure overhead.
Prefer a server’s tools over scripting around them. If an MCP server can do the thing directly, let it, rather than having the agent shell out and parse output by hand.