Every change Wellknown observed on this agent, newest first, with what it was before and what it became. Tool-surface changes carry the definition diff. Nothing here is edited after the fact.
Unknown → Unavailable
https://api.email-validation.org/a2a (a2a) — from a2a_card, with the record
Showing the latest 2 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed