diff --git a/x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/expression/function/Function.java b/x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/expression/function/Function.java
index cad5c631088f2..9d176b9f8c6d9 100644
--- a/x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/expression/function/Function.java
+++ b/x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/expression/function/Function.java
@@ -17,8 +17,8 @@
 import java.util.StringJoiner;
 
 /**
- * Any SQL expression with parentheses, like {@code MAX()}, or {@code ABS()}. A
- * function is always a {@code NamedExpression}.
+ * Any ESQL function; generally this is translated into a computation to be evaluated on arguments, including scalar functions (e.g. in
+ * {@code EVAL}) or aggregation functions ({@code STATS}).
  */
 public abstract class Function extends Expression {