diff --git a/docs/reference/esql/functions/left.asciidoc b/docs/reference/esql/functions/left.asciidoc
index 1eeadbdd8971f..29ec6b0691614 100644
--- a/docs/reference/esql/functions/left.asciidoc
+++ b/docs/reference/esql/functions/left.asciidoc
@@ -9,7 +9,7 @@ image::esql/functions/signature/left.svg[Embedded,opts=inline]
 
 *Parameters*
 
-`string`::
+`str`::
 The string from which to returns a substring.
 
 `length`::
diff --git a/docs/reference/esql/functions/length.asciidoc b/docs/reference/esql/functions/length.asciidoc
index b86cc608a6f57..b89b75a702460 100644
--- a/docs/reference/esql/functions/length.asciidoc
+++ b/docs/reference/esql/functions/length.asciidoc
@@ -6,12 +6,12 @@
 
 [source,esql]
 ----
-LENGTH(string)
+LENGTH(str)
 ----
 
 *Parameters*
 
-`string`::
+`str`::
 String expression. If `null`, the function returns `null`.
 
 *Description*
diff --git a/docs/reference/esql/functions/mv_avg.asciidoc b/docs/reference/esql/functions/mv_avg.asciidoc
index 1054c618526c1..2e5cb410c2b58 100644
--- a/docs/reference/esql/functions/mv_avg.asciidoc
+++ b/docs/reference/esql/functions/mv_avg.asciidoc
@@ -6,12 +6,12 @@
 
 [source,esql]
 ----
-MV_AVG(column)
+MV_AVG(field)
 ----
 
 *Parameters*
 
-`column`::
+`field`::
 Column to convert from multiple values to single value.
 
 *Description*
@@ -21,7 +21,7 @@ of all of the values.
 
 *Supported types*
 
-The output type is always a `double` and the input type can be any number.
+include::types/mv_avg.asciidoc[]
 
 *Example*
 
diff --git a/docs/reference/esql/functions/mv_median.asciidoc b/docs/reference/esql/functions/mv_median.asciidoc
index 252b83da436b7..ee26128c7144d 100644
--- a/docs/reference/esql/functions/mv_median.asciidoc
+++ b/docs/reference/esql/functions/mv_median.asciidoc
@@ -4,12 +4,12 @@
 
 [source,esql]
 ----
-MV_MEDIAN(column)
+MV_MEDIAN(v)
 ----
 
 *Parameters*
 
-`column`::
+`v`::
 Column to convert from multiple values to single value.
 
 *Description*
@@ -19,7 +19,7 @@ value.
 
 *Supported types*
 
-It can be used by any numeric column type and returns a value of the same type.
+include::types/mv_median.asciidoc[]
 
 *Examples*
 
diff --git a/docs/reference/esql/functions/mv_sum.asciidoc b/docs/reference/esql/functions/mv_sum.asciidoc
index bdada247ae558..9bff70d98feb3 100644
--- a/docs/reference/esql/functions/mv_sum.asciidoc
+++ b/docs/reference/esql/functions/mv_sum.asciidoc
@@ -4,12 +4,12 @@
 
 [source,esql]
 ----
-MV_SUM(column)
+MV_SUM(v)
 ----
 
 *Parameters*
 
-`column`::
+`v`::
 Column to convert from multiple values to single value.
 
 *Description*
@@ -19,8 +19,7 @@ of all of the values.
 
 *Supported types*
 
-The input type can be any number and the output type is the same as the input
-type.
+include::types/mv_sum.asciidoc[]
 
 *Example*
 
diff --git a/docs/reference/esql/functions/replace.asciidoc b/docs/reference/esql/functions/replace.asciidoc
index a0ae7e053b431..a0fc02832941e 100644
--- a/docs/reference/esql/functions/replace.asciidoc
+++ b/docs/reference/esql/functions/replace.asciidoc
@@ -25,6 +25,10 @@ expression (2nd argument) with the replacement string (3rd argument).
 
 If any of the arguments is `null`, the result is `null`.
 
+*Supported types*
+
+include::types/replace.asciidoc[]
+
 *Example*
 
 This example replaces any occurrence of the word "World" with the word
diff --git a/docs/reference/esql/functions/right.asciidoc b/docs/reference/esql/functions/right.asciidoc
index cb119138071f7..5e8e9aaf5034f 100644
--- a/docs/reference/esql/functions/right.asciidoc
+++ b/docs/reference/esql/functions/right.asciidoc
@@ -9,7 +9,7 @@ image::esql/functions/signature/right.svg[Embedded,opts=inline]
 
 *Parameters*
 
-`string`::
+`str`::
 The string from which to returns a substring.
 
 `length`::
diff --git a/docs/reference/esql/functions/round.asciidoc b/docs/reference/esql/functions/round.asciidoc
index c74d88e19554e..7f1285e85f664 100644
--- a/docs/reference/esql/functions/round.asciidoc
+++ b/docs/reference/esql/functions/round.asciidoc
@@ -20,6 +20,10 @@ Rounds a number to the closest number with the specified number of digits.
 Defaults to 0 digits if no number of digits is provided. If the specified number
 of digits is negative, rounds to the number of digits left of the decimal point.
 
+*Supported types*
+
+include::types/round.asciidoc[]
+
 *Example*
 
 [source.merge.styled,esql]
diff --git a/docs/reference/esql/functions/split.asciidoc b/docs/reference/esql/functions/split.asciidoc
index 83751af9d1196..0a4ce584d01da 100644
--- a/docs/reference/esql/functions/split.asciidoc
+++ b/docs/reference/esql/functions/split.asciidoc
@@ -17,6 +17,10 @@ Delimiter. Only single byte delimiters are currently supported.
 
 Splits a single valued string into multiple strings.
 
+*Supported types*
+
+include::types/split.asciidoc[]
+
 *Example*
 
 [source.merge.styled,esql]
diff --git a/docs/reference/esql/functions/substring.asciidoc b/docs/reference/esql/functions/substring.asciidoc
index cf181dac38024..0e5af50e6cf2b 100644
--- a/docs/reference/esql/functions/substring.asciidoc
+++ b/docs/reference/esql/functions/substring.asciidoc
@@ -21,7 +21,11 @@ Length.
 *Description*
 
 Returns a substring of a string, specified by a start position and an optional
-length. 
+length.
+
+*Supported types*
+
+include::types/substring.asciidoc[]
 
 *Examples*