# Action Audit Log

> A visible, timestamped record of the actions an agent has taken.

_The Agentic Web Lexicon · /glossary/action-audit · [JSON](/api/glossary/action-audit) · [all The Agentic Web Lexicon](/glossary)_

- **term:** Action Audit Log
- **category:** optimization
- **short_def:** A visible, timestamped record of the actions an agent has taken.
- **long_def:** The 'what did happen' half of agent trust (intent preview is the 'what will happen' half). An auditable trail lets a principal verify and, if needed, undo what an agent did.
- **see_also:** intent-preview, agent-experience
- **etymology_origin:** — (verify-against-primary-at-build)
- **related_to:** intent-preview, agent-experience
- **contrast_with:** Unlike intent preview, which asks for approval before an action, an action audit log is the after-the-fact record — the 'what did happen' half — that lets a principal verify or undo an agent's work.
- **example:** After an agent completes a task, its action audit log shows a timestamped trail of every call it made, letting the principal verify and, if needed, undo each one.
- **source:** https://biilmann.blog/articles/introducing-ax/
- **status:** emerging
- **why_it_matters:** An action audit log is the accountability half of agent trust; without it, a principal cannot verify or reverse what an autonomous agent did on their behalf.
- **sameAs:** —
- **bridge_entity:** agent-readiness
- **last_verified:** 2026-06-15
- **md_twin:** /glossary/action-audit.md