Building MCP Tools Your Agents Can Actually Call — Architecture Notes

What we check early on Building MCP Tools Your Agents Can Actually Call, what usually goes wrong in production, and how teams avoid a rewrite six months later.

Who this is for

Teams that write trade-offs down before coding burn fewer sprints when a stakeholder changes their mind mid-build. We keep ADRs short on purpose.

Decisions that still look smart in 18 months

Instrument the happy path and the ugly path. Silent failures are what turn a launch into a weekend incident.

Build checklist we actually use

Teams that write trade-offs down before coding burn fewer sprints when a stakeholder changes their mind mid-build. We keep ADRs short on purpose.

Failure modes we keep seeing

Ignore the buzzwords. For Building MCP Tools Your Agents Can Actually Call, the hard constraint is usually data ownership or ops capacity — not how many features fit on a roadmap slide.

How we measure rollout

Ship a thin vertical slice, measure, then widen. Big-bang rewrites rarely survive the first month of real traffic.

We update this when delivery patterns change on live client work.