diff --git a/changelogs/client_server/newsfragments/2687.breaking b/changelogs/client_server/newsfragments/2687.breaking
new file mode 100644
index 00000000..c40f7625
--- /dev/null
+++ b/changelogs/client_server/newsfragments/2687.breaking
@@ -0,0 +1 @@
+Document `curve25519-hkdf-sha256` key agreement method for SAS verification, and deprecate old method (MSC2630).
diff --git a/changelogs/client_server/newsfragments/2687.feature b/changelogs/client_server/newsfragments/2687.feature
deleted file mode 100644
index f70cfdee..00000000
--- a/changelogs/client_server/newsfragments/2687.feature
+++ /dev/null
@@ -1 +0,0 @@
-Document new key agreement method for SAS verification, and deprecate old method (MSC2630).
diff --git a/event-schemas/schema/m.key.verification.start$m.sas.v1 b/event-schemas/schema/m.key.verification.start$m.sas.v1
index 06f22d40..f4deb3c8 100644
--- a/event-schemas/schema/m.key.verification.start$m.sas.v1
+++ b/event-schemas/schema/m.key.verification.start$m.sas.v1
@@ -26,7 +26,7 @@ properties:
       key_agreement_protocols:
         type: array
         description: |-
-          The key agreement protocols the sending device understands. Must
+          The key agreement protocols the sending device understands. Should
           include at least ``curve25519-hkdf-sha256``.
         items:
           type: string