diff --git a/docs/src/main/sphinx/functions/system.rst b/docs/src/main/sphinx/functions/system.rst
index 85b798e6486f..7d176eb2a572 100644
--- a/docs/src/main/sphinx/functions/system.rst
+++ b/docs/src/main/sphinx/functions/system.rst
@@ -1,9 +1,12 @@
 ==================
-System Information
+System information
 ==================
 
-Functions providing information about the system environment.
+Functions providing information about the Trino cluster system environment. More
+information is available by querying the various schemas and tables exposed by
+the :doc:`/connector/system`.
 
 .. function:: version() -> varchar
 
-    Returns the server version.
+    Returns the Trino version used on the cluster. Equivalent to the value of
+    the ``node_version`` column in the ``system.runtime.nodes`` table.