Daily Digest
Do not swap tools on a hunch
Don't let an agent switch tools mid-task without proof it needs to.
The technique
Mid-flight tool swaps are tempting when a call looks flaky, but suspicion alone is not enough. Require evidence that supports the failure hypothesis, a twin that passes structural checks (schema, reachability, side-effect class), and pairwise preference for the twin in both presentation orders so position bias cannot sneak a swap through.
How it was tested
Offline structural sim (no live model): 8 replace cases. Gate matched all 8; allowed 2 full-gate replaces and blocked 6 (suspicion-only, missing signals, order bias, bad/unreachable/incomplete twin).