diff --git a/cli/compile/compile.go b/cli/compile/compile.go
index 3104ff2aa71..2ca20c6e6bd 100644
--- a/cli/compile/compile.go
+++ b/cli/compile/compile.go
@@ -116,9 +116,9 @@ func NewCommand() *cobra.Command {
 	compileCommand.Flags().BoolVarP(&verify, "verify", "t", false, tr("Verify uploaded binary after the upload."))
 	compileCommand.Flags().StringVar(&vidPid, "vid-pid", "", tr("When specified, VID/PID specific build properties are used, if board supports them."))
 	compileCommand.Flags().StringSliceVar(&library, "library", []string{},
-		tr("List of paths to libraries root folders. Libraries set this way have top priority in case of conflicts. Can be used multiple times for different libraries."))
+		tr("Path to a single library’s root folder. Can be used multiple times or entries can be comma separated."))
 	compileCommand.Flags().StringSliceVar(&libraries, "libraries", []string{},
-		tr("List of custom libraries dir paths separated by commas. Or can be used multiple times for multiple libraries dir paths."))
+		tr("Path to a collection of libraries. Can be used multiple times or entries can be comma separated."))
 	compileCommand.Flags().BoolVar(&optimizeForDebug, "optimize-for-debug", false, tr("Optional, optimize compile output for debugging, rather than for release."))
 	programmer.AddToCommand(compileCommand)
 	compileCommand.Flags().BoolVar(&compilationDatabaseOnly, "only-compilation-database", false, tr("Just produce the compilation database, without actually compiling. All build commands are skipped except pre* hooks."))
diff --git a/rpc/cc/arduino/cli/commands/v1/commands_grpc.pb.go b/rpc/cc/arduino/cli/commands/v1/commands_grpc.pb.go
index 452552c93ed..cc0e336bdc3 100644
--- a/rpc/cc/arduino/cli/commands/v1/commands_grpc.pb.go
+++ b/rpc/cc/arduino/cli/commands/v1/commands_grpc.pb.go
@@ -1,4 +1,8 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.2.0
+// - protoc             v3.17.3
+// source: cc/arduino/cli/commands/v1/commands.proto
 
 package commands
 
diff --git a/rpc/cc/arduino/cli/commands/v1/compile.pb.go b/rpc/cc/arduino/cli/commands/v1/compile.pb.go
index dad0be067ec..fc0087936f9 100644
--- a/rpc/cc/arduino/cli/commands/v1/compile.pb.go
+++ b/rpc/cc/arduino/cli/commands/v1/compile.pb.go
@@ -74,7 +74,7 @@ type CompileRequest struct {
 	// If jobs is set to 0, it will use the number of available CPUs as the
 	// maximum.
 	Jobs int32 `protobuf:"varint,14,opt,name=jobs,proto3" json:"jobs,omitempty"`
-	// List of custom libraries dir paths.
+	// A list of paths to directories containing a collection of libraries.
 	Libraries []string `protobuf:"bytes,15,rep,name=libraries,proto3" json:"libraries,omitempty"`
 	// Optimize compile output for debug, not for release.
 	OptimizeForDebug bool `protobuf:"varint,16,opt,name=optimize_for_debug,json=optimizeForDebug,proto3" json:"optimize_for_debug,omitempty"`
@@ -95,7 +95,7 @@ type CompileRequest struct {
 	// When set to `true` the compiled binary will be copied to the export
 	// directory.
 	ExportBinaries *wrapperspb.BoolValue `protobuf:"bytes,23,opt,name=export_binaries,json=exportBinaries,proto3" json:"export_binaries,omitempty"`
-	// List of paths to library root folders
+	// A list of paths to single libraries root directory.
 	Library []string `protobuf:"bytes,24,rep,name=library,proto3" json:"library,omitempty"`
 	// The path where to search for the custom signing key name and the encrypt
 	// key name
diff --git a/rpc/cc/arduino/cli/commands/v1/compile.proto b/rpc/cc/arduino/cli/commands/v1/compile.proto
index 2164aec36d8..3e8f71ae395 100644
--- a/rpc/cc/arduino/cli/commands/v1/compile.proto
+++ b/rpc/cc/arduino/cli/commands/v1/compile.proto
@@ -57,7 +57,7 @@ message CompileRequest {
   // If jobs is set to 0, it will use the number of available CPUs as the
   // maximum.
   int32 jobs = 14;
-  // List of custom libraries dir paths.
+  // A list of paths to directories containing a collection of libraries.
   repeated string libraries = 15;
   // Optimize compile output for debug, not for release.
   bool optimize_for_debug = 16;
@@ -78,7 +78,7 @@ message CompileRequest {
   // When set to `true` the compiled binary will be copied to the export
   // directory.
   google.protobuf.BoolValue export_binaries = 23;
-  // List of paths to library root folders
+  // A list of paths to single libraries root directory.
   repeated string library = 24;
   // The path where to search for the custom signing key name and the encrypt
   // key name
diff --git a/rpc/cc/arduino/cli/debug/v1/debug_grpc.pb.go b/rpc/cc/arduino/cli/debug/v1/debug_grpc.pb.go
index 87ad365dd49..31a3c8d680f 100644
--- a/rpc/cc/arduino/cli/debug/v1/debug_grpc.pb.go
+++ b/rpc/cc/arduino/cli/debug/v1/debug_grpc.pb.go
@@ -1,4 +1,8 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.2.0
+// - protoc             v3.17.3
+// source: cc/arduino/cli/debug/v1/debug.proto
 
 package debug
 
diff --git a/rpc/cc/arduino/cli/monitor/v1/monitor_grpc.pb.go b/rpc/cc/arduino/cli/monitor/v1/monitor_grpc.pb.go
index 276b4699983..be00975faa2 100644
--- a/rpc/cc/arduino/cli/monitor/v1/monitor_grpc.pb.go
+++ b/rpc/cc/arduino/cli/monitor/v1/monitor_grpc.pb.go
@@ -1,4 +1,8 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.2.0
+// - protoc             v3.17.3
+// cc/arduino/cli/monitor/v1/monitor.proto is a deprecated file.
 
 package monitor
 
diff --git a/rpc/cc/arduino/cli/settings/v1/settings_grpc.pb.go b/rpc/cc/arduino/cli/settings/v1/settings_grpc.pb.go
index 28ede224376..305d1f96cea 100644
--- a/rpc/cc/arduino/cli/settings/v1/settings_grpc.pb.go
+++ b/rpc/cc/arduino/cli/settings/v1/settings_grpc.pb.go
@@ -1,4 +1,8 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
+// versions:
+// - protoc-gen-go-grpc v1.2.0
+// - protoc             v3.17.3
+// source: cc/arduino/cli/settings/v1/settings.proto
 
 package settings