diff --git a/metrics/map.go b/metrics/map.go
index 94d30eba..062f98bb 100644
--- a/metrics/map.go
+++ b/metrics/map.go
@@ -169,8 +169,9 @@ func (m *Map) String() string {
 
 // ParseMapFromString parses a map value string into a map object.
 // Note that the values are always parsed as floats, so even a map with integer
-// values will become a float map. For example:
-// "map:code 200:10123 404:21" will be parsed as:
+// values will become a float map.
+// For example:
+// "map:code,200:10123,404:21" will be parsed as:
 // "map:code 200:10123.000 404:21.000".
 func ParseMapFromString(mapValue string) (*Map, error) {
 	tokens := strings.Split(mapValue, ",")
diff --git a/rds/server/gcp/proto/config.proto b/rds/server/gcp/proto/config.proto
index 1cae95ed..6729fc2a 100644
--- a/rds/server/gcp/proto/config.proto
+++ b/rds/server/gcp/proto/config.proto
@@ -1,4 +1,4 @@
-// Configuration proto for GCE targets.
+// Configuration proto for GCP provider.
 // Example config:
 // {
 //   project: 'test-project-id'
@@ -12,6 +12,14 @@
 //       name: "lame-duck-targets"
 //     }
 //   }
+//
+//   # Pub/Sub messages from the topic lame-duck-targets.
+//   pubsub_messages {
+//     subscription {
+//       name: "lame-duck-targets-{{.hostname}}"
+//       topic_name: "lame-duck-targets"
+//     }
+//   }
 // }
 syntax = "proto2";
 
diff --git a/rds/server/kubernetes/proto/config.proto b/rds/server/kubernetes/proto/config.proto
index 1d0920c3..af2cbfb2 100644
--- a/rds/server/kubernetes/proto/config.proto
+++ b/rds/server/kubernetes/proto/config.proto
@@ -1,15 +1,23 @@
-// Configuration proto for GCE targets.
-// Example config:
-// {
-//   project: 'test-project-id'
+// Configuration proto for Kubernetes provider.
 //
-//   # GCE instances
-//   gce_instances {}
+// Example provider config:
+// {
+//   pods {}
+// }
 //
-//   # RTC variables from the config lame-duck-targets, re-evaluated every 10s.
-//   rtc_variables {
-//     rtc_config {
-//       name: "lame-duck-targets"
+// In probe config:
+// probe {
+//   targets{
+//     rds_targets {
+//       resource_path: "k8s://pods"
+//       filter {
+//         key: "namespace"
+//         value: "default"
+//       }
+//       filter {
+//         key: "name"
+//         value: "cloudprober.*"
+//       }
 //     }
 //   }
 // }