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diff --git a/src/mongo/db/pipeline/document_source_query_stats.idl b/src/mongo/db/pipeline/document_source_query_stats.idl
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+# Copyright (C) 2023-present MongoDB, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the Server Side Public License, version 1,
+# as published by MongoDB, Inc.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# Server Side Public License for more details.
+#
+# You should have received a copy of the Server Side Public License
+# along with this program. If not, see
+# <http://www.mongodb.com/licensing/server-side-public-license>.
+#
+# As a special exception, the copyright holders give permission to link the
+# code of portions of this program with the OpenSSL library under certain
+# conditions as described in each individual source file and distribute
+# linked combinations including the program with the OpenSSL library. You
+# must comply with the Server Side Public License in all respects for
+# all of the code used other than as permitted herein. If you modify file(s)
+# with this exception, you may extend this exception to your version of the
+# file(s), but you are not obligated to do so. If you do not wish to do so,
+# delete this exception statement from your version. If you delete this
+# exception statement from all source files in the program, then also delete
+# it in the license file.
+#
+global:
+  cpp_namespace: "mongo"
+  cpp_includes:
+    - "mongo/db/pipeline/document_source_query_stats_validators.h"
+imports:
+  - "mongo/idl/basic_types.idl"
+  - "mongo/db/query/query_stats/transform_algorithm.idl"
+
+structs:
+    TransformIdentifiersSpec:
+      description: "Specification for the transformIdentifiers field of $queryStats."
+      strict: true
+      fields:
+        algorithm:
+              description: "The algorithm to use to transform the identifiers."
+              type: TransformAlgorithm
+              optional: false
+              validator:
+                    {callback: "validateAlgo"}
+        hmacKey:
+            description: >
+                The hmac key to be used to transform the identifiers. This is considered sensitive
+                data and should be redacted from data dumps, output I/O, logs, and other persistent
+                storages.
+            type: bindata_sensitive
+            optional: true
+            validator:
+                  {callback: "validateHmac"}
+    DocumentSourceQueryStatsSpec:
+        description: "Specification for a $queryStats stage."
+        strict: true
+        fields:
+          transformIdentifiers:
+            description: "The algorithm and hmac key to use when transforming identifiers."
+            type: TransformIdentifiersSpec
+            optional: true