diff --git a/internal/proto/milvus.proto b/internal/proto/milvus.proto
index 77e032fc51..15e022b51f 100644
--- a/internal/proto/milvus.proto
+++ b/internal/proto/milvus.proto
@@ -427,12 +427,21 @@ message CreateIndexRequest {
   repeated common.KeyValuePair extra_params = 5; 
 }
 
+/*
+* Get created index information. 
+* Current release of Milvus only supports showing latest built index.
+*/
 message DescribeIndexRequest {
-  common.MsgBase base = 1; // must
+  // Not useful for now
+  common.MsgBase base = 1;
+  // Not useful for now
   string db_name = 2;
-  string collection_name = 3; // must
+  // The particular collection name in Milvus
+  string collection_name = 3;
+   // The vector field name in this particular collection
   string field_name = 4;
-  string index_name = 5; // No need to set up for now @2021.06.30
+  // No need to set up for now @2021.06.30
+  string index_name = 5; 
 }
 
 message IndexDescription {
diff --git a/internal/proto/milvuspb/milvus.pb.go b/internal/proto/milvuspb/milvus.pb.go
index 54d324d93f..b61bd29d93 100644
--- a/internal/proto/milvuspb/milvus.pb.go
+++ b/internal/proto/milvuspb/milvus.pb.go
@@ -2099,15 +2099,23 @@ func (m *CreateIndexRequest) GetExtraParams() []*commonpb.KeyValuePair {
 	return nil
 }
 
+//
+// Get created index information.
+// Current release of Milvus only supports showing latest built index.
 type DescribeIndexRequest struct {
-	Base                 *commonpb.MsgBase `protobuf:"bytes,1,opt,name=base,proto3" json:"base,omitempty"`
-	DbName               string            `protobuf:"bytes,2,opt,name=db_name,json=dbName,proto3" json:"db_name,omitempty"`
-	CollectionName       string            `protobuf:"bytes,3,opt,name=collection_name,json=collectionName,proto3" json:"collection_name,omitempty"`
-	FieldName            string            `protobuf:"bytes,4,opt,name=field_name,json=fieldName,proto3" json:"field_name,omitempty"`
-	IndexName            string            `protobuf:"bytes,5,opt,name=index_name,json=indexName,proto3" json:"index_name,omitempty"`
-	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
-	XXX_unrecognized     []byte            `json:"-"`
-	XXX_sizecache        int32             `json:"-"`
+	// Not useful for now
+	Base *commonpb.MsgBase `protobuf:"bytes,1,opt,name=base,proto3" json:"base,omitempty"`
+	// Not useful for now
+	DbName string `protobuf:"bytes,2,opt,name=db_name,json=dbName,proto3" json:"db_name,omitempty"`
+	// The particular collection name in Milvus
+	CollectionName string `protobuf:"bytes,3,opt,name=collection_name,json=collectionName,proto3" json:"collection_name,omitempty"`
+	// The vector field name in this particular collection
+	FieldName string `protobuf:"bytes,4,opt,name=field_name,json=fieldName,proto3" json:"field_name,omitempty"`
+	// No need to set up for now @2021.06.30
+	IndexName            string   `protobuf:"bytes,5,opt,name=index_name,json=indexName,proto3" json:"index_name,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
 }
 
 func (m *DescribeIndexRequest) Reset()         { *m = DescribeIndexRequest{} }