disk-load retires a reading only on its module's key, and measures as soon as its watch catches up (review round 1)

A round no longer retires readings missing from the watched set, which may be empty or partial;
a module's readings are retired when its key of mesh-host_data is deleted or names fewer items.
A round refused before the watch caught up runs once it has, not an hour later. disk_round reads
this machine's key alone, as its grant allows.

Claude-Session: https://claude.ai/code/session_01NcbgfJ9Gum47zkFKWRaovL

modules/disk-load/cmd/disk-load/readings_tools.go

@@ -73,17 +73,12 @@ func ReadingTools(k *Keeper) []stdio.Tool {
 		{
 			Name: "disk_round",
 			Description: "How far this machine's last round of measuring its data items got (novox/hq ADR 0577 clause 3), from " +
-				"disk-load's state `rounds`, key `<node>`: when it started and ended (no end while it runs), how many items it had, " +
-				"measured, wrote and kept unchanged, each item that failed and why, and how old the round is; `node` reads " +
-				"another machine's key. A round that never ends, or fails every item, shows here. (r)",
-			Input: map[string]any{
-				"node": map[string]any{"type": "string", "description": "the machine whose last round to read; this one by default"},
-			},
+				"disk-load's state `rounds`, this machine's key `<node>`: when it started and ended (no end while it runs), how " +
+				"many items it had, measured, wrote and kept unchanged, each item that failed and why, and how old the round is. " +
+				"A round that never ends, or fails every item, shows here. (r)",
+			Input: map[string]any{},
 			Run: func(args map[string]any) (any, error) {
-				node := text(args, "node")
-				if node == "" {
-					node = k.Node
-				}
+				node := k.Node
 				if k.Rounds == nil {
 					return nil, fmt.Errorf("this disk-load keeps no rounds")
 				}