diff --git a/changelogs/client_server/newsfragments/2132.clarification b/changelogs/client_server/newsfragments/2132.clarification
new file mode 100644
index 00000000..53063400
--- /dev/null
+++ b/changelogs/client_server/newsfragments/2132.clarification
@@ -0,0 +1 @@
+Clarify the distinction between *m.key.verification.start* and its *m.sas.v1* variant.
diff --git a/event-schemas/schema/m.key.verification.start b/event-schemas/schema/m.key.verification.start
index ad59d6c7..99b4998e 100644
--- a/event-schemas/schema/m.key.verification.start
+++ b/event-schemas/schema/m.key.verification.start
@@ -3,7 +3,7 @@ allOf:
   - $ref: core-event-schema/event.yaml
 
 description: |-
-  Begins a key verification process. Typically sent as a `to-device`_ event.
+  Begins a key verification process. Typically sent as a `to-device`_ event. The ``method`` field determines the type of verification. The fields in the event will differ depending on the ``method``. This definition includes fields that are in common among all variants.
 properties:
   content:
     properties:
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 867ca820..a42f20e7 100644
--- a/event-schemas/schema/m.key.verification.start$m.sas.v1
+++ b/event-schemas/schema/m.key.verification.start$m.sas.v1
@@ -3,7 +3,7 @@ allOf:
   - $ref: core-event-schema/event.yaml
 
 description: |-
-  Begins a SAS key verification process. Typically sent as a `to-device`_ event.
+  Begins an SAS key verification process using the ``m.sas.v1`` method. Typically sent as a `to-device`_ event.
 properties:
   content:
     properties:
@@ -22,7 +22,11 @@ properties:
         type: string
         enum: ["m.sas.v1"]
         description: |-
-          The verification method to use. Must be ``m.sas.v1``.
+          The verification method to use.
+      next_method:
+        type: string
+        description: |-
+          Optional method to use to verify the other user's key with.
       key_agreement_protocols:
         type: array
         description: |-
diff --git a/scripts/templating/matrix_templates/units.py b/scripts/templating/matrix_templates/units.py
index 157fa5a1..8538de2d 100644
--- a/scripts/templating/matrix_templates/units.py
+++ b/scripts/templating/matrix_templates/units.py
@@ -902,6 +902,15 @@ class MatrixUnits(Units):
                 "`m.room.message msgtypes`_."
             )
 
+        # method types for m.key.verification.start
+        if schema["type"] == "m.key.verification.start":
+            methods = Units.prop(
+                json_schema, "properties/content/properties/method/enum"
+            )
+            if methods:
+                schema["type_with_msgtype"] = schema["type"] + " (" + methods[0] + ")"
+
+
         # Assign state key info if it has some
         if schema["typeof"] == "State Event":
             skey_desc = Units.prop(