diff --git a/03-DESIGN/01-to-be/47-milestones/G-22-lead-answers-2.md b/03-DESIGN/01-to-be/47-milestones/G-22-lead-answers-2.md
index 3883e876..ab0ccc50 100644
--- a/03-DESIGN/01-to-be/47-milestones/G-22-lead-answers-2.md
+++ b/03-DESIGN/01-to-be/47-milestones/G-22-lead-answers-2.md
@@ -125,3 +125,8 @@ the principle that settles it, cited as "design 47 G A-n".
   `keys.EscapeName`, the one escape form for every name in a key, in both gates: `<node>.act.<escaped digest>`. The
   kind (a test's in-memory state accepting a key the bus refuses) is fixed where it lives: mesh-sdk's in-memory state
   for tests refuses every key the bus would.
+- **A-210** (§7, §428, A-126, A-131, ADR 0596; principles 3 and 7) A module that calls another module's tool or hears
+  its module events finds that module as the holder of the seat it holds, with `seatlist.HolderOf`, when it calls,
+  asking again after a failure and never stopping its start for it; a read of another module's bucket goes (each by
+  its own row). A tool's callers list names no module: it takes the holders of the seats `node-tool-runner` and
+  `mesh-healers` from the seat list when a call is checked, beside `operator`.