Glossary

Trajectory Quality

An evaluation of the intermediate steps in a multi-step agent workflow — tool selection, reasoning quality, error recovery, escalation decisions — not just the final output. A tool-calling error early in a trajectory silently corrupts every downstream step, which final-answer accuracy alone won't catch.

An agent can produce a correct final answer while its reasoning path silently corrupted an intermediate step. Trajectory evaluation is the only way to catch that before it compounds.