diff --git a/src/openhuman/memory/tree/retrieval/rpc.rs b/src/openhuman/memory/tree/retrieval/rpc.rs
index 31b4dd587..8731d908c 100644
--- a/src/openhuman/memory/tree/retrieval/rpc.rs
+++ b/src/openhuman/memory/tree/retrieval/rpc.rs
@@ -84,6 +84,7 @@ pub async fn query_source_rpc(
 /// Request body for `memory_tree_query_global`.
 #[derive(Clone, Debug, Serialize, Deserialize)]
 pub struct QueryGlobalRequest {
+    #[serde(alias = "time_window_days")]
     pub window_days: u32,
 }
 
@@ -421,6 +422,16 @@ mod tests {
         );
     }
 
+    #[test]
+    fn query_global_request_accepts_consolidated_time_window_alias() {
+        let req: QueryGlobalRequest = serde_json::from_value(serde_json::json!({
+            "time_window_days": 7
+        }))
+        .expect("time_window_days alias should deserialize");
+
+        assert_eq!(req.window_days, 7);
+    }
+
     // ── query_topic_rpc ───────────────────────────────────────────────
 
     #[tokio::test]
diff --git a/src/openhuman/tools/impl/memory/tree/mod.rs b/src/openhuman/tools/impl/memory/tree/mod.rs
index c0b4c99a8..6fe5e6855 100644
--- a/src/openhuman/tools/impl/memory/tree/mod.rs
+++ b/src/openhuman/tools/impl/memory/tree/mod.rs
@@ -81,7 +81,11 @@ impl Tool for MemoryTreeTool {
                 },
                 "time_window_days": {
                     "type": "integer",
-                    "description": "query_source/query_global: look-back window in days."
+                    "description": "query_source/query_topic: look-back window in days. query_global also accepts this as a compatibility alias."
+                },
+                "window_days": {
+                    "type": "integer",
+                    "description": "query_global: look-back window in days."
                 },
                 // drill_down params
                 "node_id": {
@@ -169,6 +173,17 @@ mod memory_tree_dispatcher_tests {
         assert!(modes.contains(&"fetch_leaves"));
     }
 
+    #[test]
+    fn memory_tree_schema_exposes_global_window_days() {
+        let schema = MemoryTreeTool.parameters_schema();
+        let properties = schema
+            .get("properties")
+            .and_then(|p| p.as_object())
+            .unwrap();
+        assert!(properties.contains_key("window_days"));
+        assert!(properties.contains_key("time_window_days"));
+    }
+
     #[tokio::test]
     async fn memory_tree_unknown_mode_returns_error() {
         let result = MemoryTreeTool