diff --git a/extra/mcp/tracy_mcp.py b/extra/mcp/tracy_mcp.py
index 50432363..28a8e787 100644
--- a/extra/mcp/tracy_mcp.py
+++ b/extra/mcp/tracy_mcp.py
@@ -385,6 +385,11 @@ async def list_instances() -> list[dict]:
     kicks in at the `TRACY_MCP_MAX_INSTANCES` cap (LRU, connected live
     instances are never evicted) or after a disconnected live instance sits
     idle past `TRACY_MCP_DISCONNECTED_TTL_S`.
+
+    `background_done: false` means a just-loaded capture is still building
+    zone/symbol statistics on a background thread — `get_all_zone_stats`
+    and similar stats-based `eval` queries can return empty or partial
+    results until this flips to true.
     """
     now = time.time()
     return [
@@ -394,6 +399,7 @@ async def list_instances() -> list[dict]:
             "mtime": inst.mtime,
             "live": inst.path is None,
             "connected": inst.worker.is_connected() if inst.path is None and inst.worker else None,
+            "background_done": inst.worker.is_background_done() if inst.worker else None,
             "idle_seconds": now - inst.last_used,
         }
         for name, inst in instances.items()
@@ -523,6 +529,12 @@ async def load_capture(path: str, alias: str | None = None) -> str:
 
     If you don't already have a path, call `list_captures` first — it lists
     .tracy files in the TRACY_CAPTURES_DIR environment directory.
+
+    Loading returns before zone/symbol statistics finish building — a
+    background thread populates them after the file itself is read. Check
+    `background_done` in `list_instances` (or poll it) before relying on
+    `get_all_zone_stats` and similar stats-based `eval` queries; they can
+    return empty or partial results until it's true.
     """
     if not tracy_server:
         return "Error: Tracy Server bindings not found."
diff --git a/python/bindings/ServerModule.cpp b/python/bindings/ServerModule.cpp
index 261e4a13..42c5aae5 100644
--- a/python/bindings/ServerModule.cpp
+++ b/python/bindings/ServerModule.cpp
@@ -230,14 +230,21 @@ PYBIND11_MODULE( TracyServerBindings, m )
 
         // --- Sections ---
         .def( "get_sections", locked( +[]( const Worker& w ) {
+            // GetSections() is keyed by category (multiple named section sets);
+            // flatten across categories, tagging each item with its category name.
         py::list result;
-        for( auto& s : w.GetSections() )
+        for( const auto& kv : w.GetSections() )
         {
-            py::dict d;
-            d["start"] = s.start.Val();
-            d["end"] = s.end.Val();
-            d["text"] = std::string( w.GetString( s.text ) );
-            result.append( d );
+            const char* category = w.GetSectionCategoryDescription( kv.first );
+            for( const auto& s : kv.second )
+            {
+                py::dict d;
+                d["category"] = std::string( category );
+                d["start"] = s.start.Val();
+                d["end"] = s.end.Val();
+                d["text"] = std::string( w.GetString( s.text ) );
+                result.append( d );
+            }
         }
         return result;
     } ) )
@@ -1098,7 +1105,11 @@ PYBIND11_MODULE( TracyServerBindings, m )
         // --- Connection control ---
         .def( "is_connected", &Worker::IsConnected )
         .def( "shutdown", &Worker::Shutdown )
-        .def( "disconnect", &Worker::Disconnect );
+        .def( "disconnect", &Worker::Disconnect )
+        // Plain relaxed atomic like IsConnected() above — no locked()
+        // needed. True once post-load zone/symbol stats have finished
+        // building; get_all_zone_stats() et al. can be empty until then.
+        .def( "is_background_done", &Worker::IsBackgroundDone );
 
     // -------------------------------------------------------------------------
     // FileRead