diff --git a/internal/internal_worker_base.go b/internal/internal_worker_base.go
index 73ca9461b..4602a1f97 100644
--- a/internal/internal_worker_base.go
+++ b/internal/internal_worker_base.go
@@ -142,7 +142,7 @@ type (
 		logger               *zap.Logger
 		metricsScope         tally.Scope
 
-		concurrency            *worker.Concurrency
+		concurrency        *worker.ConcurrencyLimit
 		pollerAutoScaler   *pollerAutoScaler
 		taskQueueCh        chan interface{}
 		sessionTokenBucket *sessionTokenBucket
@@ -168,7 +168,7 @@ func createPollRetryPolicy() backoff.RetryPolicy {
 func newBaseWorker(options baseWorkerOptions, logger *zap.Logger, metricsScope tally.Scope, sessionTokenBucket *sessionTokenBucket) *baseWorker {
 	ctx, cancel := context.WithCancel(context.Background())
 
-	concurrency := &worker.Concurrency{
+	concurrency := &worker.ConcurrencyLimit{
 		PollerPermit: worker.NewPermit(options.pollerCount),
 		TaskPermit:   worker.NewPermit(options.maxConcurrentTask),
 	}
@@ -190,7 +190,7 @@ func newBaseWorker(options baseWorkerOptions, logger *zap.Logger, metricsScope t
 		retrier:              backoff.NewConcurrentRetrier(pollOperationRetryPolicy),
 		logger:               logger.With(zapcore.Field{Key: tagWorkerType, Type: zapcore.StringType, String: options.workerType}),
 		metricsScope:         tagScope(metricsScope, tagWorkerType, options.workerType),
-		concurrency:              concurrency,
+		concurrency:          concurrency,
 		pollerAutoScaler:     pollerAS,
 		taskQueueCh:          make(chan interface{}), // no buffer, so poller only able to poll new task after previous is dispatched.
 		limiterContext:       ctx,
diff --git a/internal/worker/concurrency.go b/internal/worker/concurrency.go
index 45d0dadc8..65c0f695f 100644
--- a/internal/worker/concurrency.go
+++ b/internal/worker/concurrency.go
@@ -30,13 +30,13 @@ import (
 
 var _ Permit = (*permit)(nil)
 
-// Concurrency contains synchronization primitives for dynamically controlling the concurrencies in workers
-type Concurrency struct {
+// ConcurrencyLimit contains synchronization primitives for dynamically controlling the concurrencies in workers
+type ConcurrencyLimit struct {
 	PollerPermit Permit // controls concurrency of pollers
 	TaskPermit   Permit // controlls concurrency of task processings
 }
 
-// Permit is an adaptive
+// Permit is an adaptive permit issuer to control concurrency
 type Permit interface {
 	Acquire(context.Context, int) error
 	AcquireChan(context.Context, *sync.WaitGroup) <-chan struct{}