diff --git a/OpenRA.Mods.RA/Move/PathFinder.cs b/OpenRA.Mods.RA/Move/PathFinder.cs
index 7ed014a125..a980745018 100644
--- a/OpenRA.Mods.RA/Move/PathFinder.cs
+++ b/OpenRA.Mods.RA/Move/PathFinder.cs
@@ -19,6 +19,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA.Move
 {
+	[Desc("Calculates routes for mobile units based on the A* search algorithm.", " Attach this to the world actor.")]
 	public class PathFinderInfo : ITraitInfo
 	{
 		public object Create(ActorInitializer init) { return new PathFinder(init.world); }
diff --git a/OpenRA.Mods.RA/Player/PlaceBuilding.cs b/OpenRA.Mods.RA/Player/PlaceBuilding.cs
index 341618d553..6bf346ab01 100644
--- a/OpenRA.Mods.RA/Player/PlaceBuilding.cs
+++ b/OpenRA.Mods.RA/Player/PlaceBuilding.cs
@@ -16,6 +16,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA
 {
+	[Desc("Allows to execute build orders.", " Attach this to the player actor.")]
 	class PlaceBuildingInfo : TraitInfo<PlaceBuilding> { }
 
 	class PlaceBuilding : IResolveOrder
diff --git a/OpenRA.Mods.RA/Player/TechTree.cs b/OpenRA.Mods.RA/Player/TechTree.cs
index 45929e9884..728c8693b4 100755
--- a/OpenRA.Mods.RA/Player/TechTree.cs
+++ b/OpenRA.Mods.RA/Player/TechTree.cs
@@ -15,6 +15,7 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA
 {
+	[Desc("Manages build limits and pre-requisites.", " Attach this to the player actor.")]
 	public class TechTreeInfo : ITraitInfo
 	{
 		public object Create(ActorInitializer init) { return new TechTree(init); }
diff --git a/OpenRA.Mods.RA/Reservable.cs b/OpenRA.Mods.RA/Reservable.cs
index 975710705c..b9c9e2a228 100755
--- a/OpenRA.Mods.RA/Reservable.cs
+++ b/OpenRA.Mods.RA/Reservable.cs
@@ -15,7 +15,8 @@ using OpenRA.Traits;
 
 namespace OpenRA.Mods.RA
 {
-	class ReservableInfo : TraitInfo<Reservable> {}
+	[Desc("Reserve landing places for aircraft.")]
+	class ReservableInfo : TraitInfo<Reservable> { }
 
 	public class Reservable : ITick, INotifyKilled, INotifyCapture, INotifySold
 	{