diff --git a/crates/rrt-runtime/src/smp.rs b/crates/rrt-runtime/src/smp.rs
index f72e926..17b45cb 100644
--- a/crates/rrt-runtime/src/smp.rs
+++ b/crates/rrt-runtime/src/smp.rs
@@ -9452,6 +9452,27 @@ fn parse_event_runtime_collection_summary_with_tag_width(
             .collect::<Vec<_>>();
         mutation_candidate_opcodes.sort_unstable();
         mutation_candidate_opcodes.dedup();
+        let mut mutation_candidate_descriptor_labels = records
+            .iter()
+            .flat_map(|record| record.grouped_effect_rows.iter())
+            .filter(|row| {
+                opcode_reaches_world_apply_compact_runtime_effect_dispatch_strip(row.opcode)
+            })
+            .filter_map(|row| row.descriptor_label.clone())
+            .collect::<Vec<_>>();
+        mutation_candidate_descriptor_labels.sort_unstable();
+        mutation_candidate_descriptor_labels.dedup();
+        let mut mutation_candidate_unknown_descriptor_ids = records
+            .iter()
+            .flat_map(|record| record.grouped_effect_rows.iter())
+            .filter(|row| {
+                opcode_reaches_world_apply_compact_runtime_effect_dispatch_strip(row.opcode)
+                    && row.descriptor_label.is_none()
+            })
+            .map(|row| row.descriptor_id)
+            .collect::<Vec<_>>();
+        mutation_candidate_unknown_descriptor_ids.sort_unstable();
+        mutation_candidate_unknown_descriptor_ids.dedup();
         let mut control_lane_notes = Vec::new();
         if nondirect_compact_record_count != 0
             && nondirect_compact_record_count == nondirect_compact_records_missing_trigger_kind
@@ -9468,13 +9489,25 @@ fn parse_event_runtime_collection_summary_with_tag_width(
         }
         if !mutation_candidate_record_indexes.is_empty() {
             control_lane_notes.push(format!(
-                "records with grouped opcodes already in the 0x00431b20 mutation strip = {:?}",
+                "records with grouped opcodes already in the 0x00431b20 dispatch strip = {:?}",
                 mutation_candidate_record_indexes
             ));
             control_lane_notes.push(format!(
-                "0x00431b20 mutation-strip opcodes present in decoded grouped rows = {:?}",
+                "0x00431b20 dispatch-strip opcodes present in decoded grouped rows = {:?}",
                 mutation_candidate_opcodes
             ));
+            if !mutation_candidate_descriptor_labels.is_empty() {
+                control_lane_notes.push(format!(
+                    "decoded grouped descriptor labels present in the 0x00431b20 dispatch strip = {:?}",
+                    mutation_candidate_descriptor_labels
+                ));
+            }
+            if !mutation_candidate_unknown_descriptor_ids.is_empty() {
+                control_lane_notes.push(format!(
+                    "grouped descriptor ids still missing checked-in labels in the 0x00431b20 dispatch strip = {:?}",
+                    mutation_candidate_unknown_descriptor_ids
+                ));
+            }
         }
 
         return Some(SmpLoadedEventRuntimeCollectionSummary {
@@ -22181,11 +22214,16 @@ mod tests {
         }));
         assert!(summary.control_lane_notes.iter().any(|line| {
             line.contains(
-                "records with grouped opcodes already in the 0x00431b20 mutation strip = [0]",
+                "records with grouped opcodes already in the 0x00431b20 dispatch strip = [0]",
             )
         }));
         assert!(summary.control_lane_notes.iter().any(|line| {
-            line.contains("0x00431b20 mutation-strip opcodes present in decoded grouped rows = [4]")
+            line.contains("0x00431b20 dispatch-strip opcodes present in decoded grouped rows = [4]")
+        }));
+        assert!(summary.control_lane_notes.iter().any(|line| {
+            line.contains(
+                "decoded grouped descriptor labels present in the 0x00431b20 dispatch strip = [\"Company Variable 1\"]",
+            )
         }));
         let record = summary
             .records
diff --git a/docs/rehost-queue.md b/docs/rehost-queue.md
index 4dbb38b..64d0447 100644
--- a/docs/rehost-queue.md
+++ b/docs/rehost-queue.md
@@ -254,9 +254,17 @@ Working rule:
     non-row-body control lane rather than the compact row framing itself
   - the same probe now narrows the candidate runtime-effect set too:
     it reports which decoded records already carry grouped opcodes in the grounded
-    `0x00431b20` mutation strip; real `War Effort.gmp` currently narrows that to record indexes
-    `[1, 9, 12, 13, 14, 15, 16, 17, 22]`, all through opcode `4`, so the next pass can focus on
-    that smaller subset instead of the full 24-row compact collection
+    `0x00431b20` dispatch strip; real `War Effort.gmp` currently narrows that to record indexes
+    `[1, 9, 12, 13, 14, 15, 16, 17, 22]`, all through opcode `4`, with descriptor labels
+    `Game Variable 1`, `Company Variable 1..4`, and `Player Variable 1`, so the next pass can
+    focus on that smaller subset instead of the full 24-row compact collection while avoiding the
+    earlier overclaim that opcode `4` alone already proves a placed-structure mutation row
+  - cross-map probing now gives a better static-analysis lead too:
+    `British Isles.gmp` shows no current `0x00431b20` dispatch-strip rows, `Germany.gmp` stays on
+    `Game Variable 1` plus `Company Variable 3..4`, while `Texas Tea.gmp` adds `Economic Status`
+    and one still-unlabeled grouped descriptor id `548`; that makes descriptor `548` plus the
+    `opcode 8` branch on record `7` the next concrete non-hook analysis target above the compact
+    runtime-event loader
   - the concrete owner strip above that bundle is grounded now too:
     `0x00433060` is the direct non-direct serializer loop that writes `0x4e99/0x4e9a/0x4e9b`,
     calls `0x00430d70` per live collection row, and sits beside the sibling `0x00433130` size/load