diff --git a/alts/src/main/java/io/grpc/alts/internal/AltsProtocolNegotiator.java b/alts/src/main/java/io/grpc/alts/internal/AltsProtocolNegotiator.java
index edfff2b481f..5ce5a345aba 100644
--- a/alts/src/main/java/io/grpc/alts/internal/AltsProtocolNegotiator.java
+++ b/alts/src/main/java/io/grpc/alts/internal/AltsProtocolNegotiator.java
@@ -58,10 +58,11 @@ public final class AltsProtocolNegotiator {
   private static final AsyncSemaphore handshakeSemaphore = new AsyncSemaphore(32);
 
   @Grpc.TransportAttr
-  public static final Attributes.Key<TsiPeer> TSI_PEER_KEY = Attributes.Key.create("TSI_PEER");
+  public static final Attributes.Key<TsiPeer> TSI_PEER_KEY =
+      Attributes.Key.create("internal:TSI_PEER");
   @Grpc.TransportAttr
   public static final Attributes.Key<Object> AUTH_CONTEXT_KEY =
-      Attributes.Key.create("AUTH_CONTEXT_KEY");
+      Attributes.Key.create("internal:AUTH_CONTEXT_KEY");
 
   private static final AsciiString SCHEME = AsciiString.of("https");
 
diff --git a/api/src/main/java/io/grpc/EquivalentAddressGroup.java b/api/src/main/java/io/grpc/EquivalentAddressGroup.java
index 34b2957d836..915907d64b4 100644
--- a/api/src/main/java/io/grpc/EquivalentAddressGroup.java
+++ b/api/src/main/java/io/grpc/EquivalentAddressGroup.java
@@ -44,7 +44,7 @@ public final class EquivalentAddressGroup {
   @Attr
   @ExperimentalApi("https://github.com/grpc/grpc-java/issues/6138")
   public static final Attributes.Key<String> ATTR_AUTHORITY_OVERRIDE =
-      Attributes.Key.create("io.grpc.EquivalentAddressGroup.authorityOverride");
+      Attributes.Key.create("io.grpc.EquivalentAddressGroup.ATTR_AUTHORITY_OVERRIDE");
   private final List<SocketAddress> addrs;
   private final Attributes attrs;
 
diff --git a/api/src/main/java/io/grpc/Grpc.java b/api/src/main/java/io/grpc/Grpc.java
index 7855c7db2a4..baa9f5f0ab6 100644
--- a/api/src/main/java/io/grpc/Grpc.java
+++ b/api/src/main/java/io/grpc/Grpc.java
@@ -38,7 +38,7 @@ private Grpc() {
   @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1710")
   @TransportAttr
   public static final Attributes.Key<SocketAddress> TRANSPORT_ATTR_REMOTE_ADDR =
-      Attributes.Key.create("remote-addr");
+      Attributes.Key.create("io.grpc.Grpc.TRANSPORT_ATTR_REMOTE_ADDR");
 
   /**
    * Attribute key for the local address of a transport.
@@ -46,7 +46,7 @@ private Grpc() {
   @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1710")
   @TransportAttr
   public static final Attributes.Key<SocketAddress> TRANSPORT_ATTR_LOCAL_ADDR =
-      Attributes.Key.create("local-addr");
+      Attributes.Key.create("io.grpc.Grpc.TRANSPORT_ATTR_LOCAL_ADDR");
 
   /**
    * Attribute key for SSL session of a transport.
@@ -54,7 +54,7 @@ private Grpc() {
   @ExperimentalApi("https://github.com/grpc/grpc-java/issues/1710")
   @TransportAttr
   public static final Attributes.Key<SSLSession> TRANSPORT_ATTR_SSL_SESSION =
-      Attributes.Key.create("ssl-session");
+      Attributes.Key.create("io.grpc.Grpc.TRANSPORT_ATTR_SSL_SESSION");
 
   /**
    * Annotation for transport attributes. It follows the annotation semantics defined
diff --git a/api/src/main/java/io/grpc/InternalConfigSelector.java b/api/src/main/java/io/grpc/InternalConfigSelector.java
index fa8ac5c9c60..38856f440b4 100644
--- a/api/src/main/java/io/grpc/InternalConfigSelector.java
+++ b/api/src/main/java/io/grpc/InternalConfigSelector.java
@@ -32,7 +32,7 @@
 public abstract class InternalConfigSelector {
   @NameResolver.ResolutionResultAttr
   public static final Attributes.Key<io.grpc.InternalConfigSelector> KEY
-      = Attributes.Key.create("io.grpc.config-selector");
+      = Attributes.Key.create("internal:io.grpc.config-selector");
 
   // Use PickSubchannelArgs for SelectConfigArgs for now. May change over time.
   /** Selects the config for an PRC. */
diff --git a/api/src/main/java/io/grpc/LoadBalancer.java b/api/src/main/java/io/grpc/LoadBalancer.java
index 4a39ce9d40f..8d74216b36f 100644
--- a/api/src/main/java/io/grpc/LoadBalancer.java
+++ b/api/src/main/java/io/grpc/LoadBalancer.java
@@ -114,7 +114,7 @@ public abstract class LoadBalancer {
   @Internal
   @NameResolver.ResolutionResultAttr
   public static final Attributes.Key<Map<String, ?>> ATTR_HEALTH_CHECKING_CONFIG =
-      Attributes.Key.create("health-checking-config");
+      Attributes.Key.create("internal:health-checking-config");
   private int recursionCount;
 
   /**
diff --git a/binder/src/main/java/io/grpc/binder/internal/BinderTransport.java b/binder/src/main/java/io/grpc/binder/internal/BinderTransport.java
index 30df131643a..bdcd53a9ea6 100644
--- a/binder/src/main/java/io/grpc/binder/internal/BinderTransport.java
+++ b/binder/src/main/java/io/grpc/binder/internal/BinderTransport.java
@@ -109,17 +109,18 @@ public abstract class BinderTransport
    * active transport.
    */
   @Internal
-  public static final Attributes.Key<Integer> REMOTE_UID = Attributes.Key.create("remote-uid");
+  public static final Attributes.Key<Integer> REMOTE_UID =
+      Attributes.Key.create("internal:remote-uid");
 
   /** The authority of the server. */
   @Internal
   public static final Attributes.Key<String> SERVER_AUTHORITY =
-      Attributes.Key.create("server-authority");
+      Attributes.Key.create("internal:server-authority");
 
   /** A transport attribute to hold the {@link InboundParcelablePolicy}. */
   @Internal
   public static final Attributes.Key<InboundParcelablePolicy> INBOUND_PARCELABLE_POLICY =
-      Attributes.Key.create("inbound-parcelable-policy");
+      Attributes.Key.create("internal:inbound-parcelable-policy");
 
   /**
    * Version code for this wire format.
diff --git a/binder/src/main/java/io/grpc/binder/internal/BinderTransportSecurity.java b/binder/src/main/java/io/grpc/binder/internal/BinderTransportSecurity.java
index d4c8e48f953..b968e744685 100644
--- a/binder/src/main/java/io/grpc/binder/internal/BinderTransportSecurity.java
+++ b/binder/src/main/java/io/grpc/binder/internal/BinderTransportSecurity.java
@@ -40,7 +40,7 @@
 public final class BinderTransportSecurity {
 
   private static final Attributes.Key<TransportAuthorizationState> TRANSPORT_AUTHORIZATION_STATE =
-      Attributes.Key.create("transport-authorization-state");
+      Attributes.Key.create("internal:transport-authorization-state");
 
   private BinderTransportSecurity() {}
 
diff --git a/grpclb/src/main/java/io/grpc/grpclb/GrpclbConstants.java b/grpclb/src/main/java/io/grpc/grpclb/GrpclbConstants.java
index bda6473b0cc..be09b1ce306 100644
--- a/grpclb/src/main/java/io/grpc/grpclb/GrpclbConstants.java
+++ b/grpclb/src/main/java/io/grpc/grpclb/GrpclbConstants.java
@@ -46,7 +46,7 @@ public final class GrpclbConstants {
    * Attribute key for gRPC LB server addresses.
    */
   public static final Attributes.Key<List<EquivalentAddressGroup>> ATTR_LB_ADDRS =
-      Attributes.Key.create("io.grpc.grpclb.lbAddrs");
+      Attributes.Key.create("io.grpc.grpclb.GrpclbConstants.ATTR_LB_ADDRS");
 
   /**
    * The naming authority of a gRPC LB server address.  It is an address-group-level attribute,
@@ -54,7 +54,7 @@ public final class GrpclbConstants {
    */
   @EquivalentAddressGroup.Attr
   public static final Attributes.Key<String> ATTR_LB_ADDR_AUTHORITY =
-      Attributes.Key.create("io.grpc.grpclb.lbAddrAuthority");
+      Attributes.Key.create("io.grpc.grpclb.GrpclbConstants.ATTR_LB_ADDR_AUTHORITY");
 
   /**
    * Whether this EquivalentAddressGroup was provided by a GRPCLB server. It would be rare for this
@@ -62,7 +62,7 @@ public final class GrpclbConstants {
    */
   @EquivalentAddressGroup.Attr
   public static final Attributes.Key<Boolean> ATTR_LB_PROVIDED_BACKEND =
-      Attributes.Key.create("io.grpc.grpclb.lbProvidedBackend");
+      Attributes.Key.create("io.grpc.grpclb.GrpclbConstants.ATTR_LB_PROVIDED_BACKEND");
 
   private GrpclbConstants() { }
 }