Eval And Observability Tools
Evidence
- agent evaluations - Topic synthesis
- arize - Tool inventory
- braintrust - Tool inventory
- langfuse - Tool inventory
- agent eval gate - Harness
- 2026 06 30 soumya gupta building closed loop evals for a multimodal agent at uber scale - Official schedule
Decision Question
Compare eval and observability tooling by whether it connects user outcomes, traces, policy checks, and regression tests into one improvement loop.
Criteria
- Custom eval authoring and versioning
- Trace and span quality for agent workflows
- Dataset management and failure clustering
- Human review ergonomics
- Production feedback loop support
Tentative Recommendation
Tentative: require a trial that reproduces one production-like failure and shows how the tool would prevent or detect it next time.
Confidence
medium. No recommendation should be treated as final without a hands-on trial or source-backed comparison for the concrete use case.
Open Questions
- Which current project workflow is the evaluation being applied to?
- Which failure mode would make the recommendation wrong?
- Which source or trial result would change the score?