diff --git a/libraries/stdlib/src/kotlin/util/Standard.kt b/libraries/stdlib/src/kotlin/util/Standard.kt
index 477b46c149b..6155ff3407d 100644
--- a/libraries/stdlib/src/kotlin/util/Standard.kt
+++ b/libraries/stdlib/src/kotlin/util/Standard.kt
@@ -9,23 +9,26 @@ package kotlin
 public fun <A, B> A.to(that: B): Pair<A, B> = Pair(this, that)
 
 /**
- * Calls the specified function.
+ * Calls the specified function [f] and returns its result.
  */
 public inline fun <R> run(f: () -> R): R = f()
 
 /**
- * Calls the specified function with this value as its receiver.
+ * Calls the specified function [f] with `this` value as its receiver and returns its result.
  */
 public inline fun <T, R> T.run(f: T.() -> R): R = f()
 
 /**
- * Execute f with given receiver
+ * Calls the specified function [f] with the given [receiver] as its receiver and returns its result.
  */
 public inline fun <T, R> with(receiver: T, f: T.() -> R): R = receiver.f()
 
+/**
+ * Calls the specified function [f] with `this` value as its receiver and returns `this` value.
+ */
 public inline fun <T> T.apply(f: T.() -> Unit): T { f(); return this }
 
 /**
- * Converts receiver to body parameter
+ * Calls the specified function [f] with `this` value as its argument and returns its result.
  */
 public inline fun <T, R> T.let(f: (T) -> R): R = f(this)