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.
Unavailable → Live
Unknown → Unavailable
Certificate recorded, valid to 2026-12-18
https://www.gaipagents.com/a2a/listing-observer (a2a) — from ard_catalog, with the record
Showing the latest 4 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed