diff --git a/src/runtime/metrics/description.go b/src/runtime/metrics/description.go
index 9d3611b..32af5d1 100644
--- a/src/runtime/metrics/description.go
+++ b/src/runtime/metrics/description.go
@@ -113,14 +113,13 @@
 		Kind: KindUint64,
 	},
 	{
-		Name: "/memory/classes/heap/stacks:bytes",
-		Description: "Memory allocated from the heap that is reserved for stack space. Not all of it is necessarily " +
-			"simultaneously in use, but it may not be used for any other purpose.",
-		Kind: KindUint64,
+		Name:        "/memory/classes/heap/stacks:bytes",
+		Description: "Memory allocated from the heap that is reserved for stack space, whether or not it is currently in-use.",
+		Kind:        KindUint64,
 	},
 	{
 		Name:        "/memory/classes/heap/unused:bytes",
-		Description: "Memory that is reserved for heap objects but is otherwise not currently used to hold heap objects.",
+		Description: "Memory that is reserved for heap objects but is not currently used to hold heap objects.",
 		Kind:        KindUint64,
 	},
 	{
diff --git a/src/runtime/metrics/doc.go b/src/runtime/metrics/doc.go
index f58cdcd..42b5bc3 100644
--- a/src/runtime/metrics/doc.go
+++ b/src/runtime/metrics/doc.go
@@ -86,12 +86,11 @@
 
 	/memory/classes/heap/stacks:bytes
 		Memory allocated from the heap that is reserved for stack
-		space. Not all of it is necessarily simultaneously in use, but
-		it may not be used for any other purpose.
+		space, whether or not it is currently in-use.
 
 	/memory/classes/heap/unused:bytes
-		Memory that is reserved for heap objects but is otherwise not
-		currently used to hold heap objects.
+		Memory that is reserved for heap objects but is not currently
+		used to hold heap objects.
 
 	/memory/classes/metadata/mcache/free:bytes
 		Memory that is reserved for runtime mcache structures, but