diff --git a/event-schemas/schema/v1/m.call.answer b/event-schemas/schema/v1/m.call.answer
index 7baaaf7fc..ea5614839 100644
--- a/event-schemas/schema/v1/m.call.answer
+++ b/event-schemas/schema/v1/m.call.answer
@@ -14,7 +14,7 @@
                 },
                 "answer": {
                     "type": "object",
-                    "description": "",
+                    "description": "The session description object",
                     "properties": {
                         "type": {
                             "type": "string",
diff --git a/event-schemas/schema/v1/m.call.candidates b/event-schemas/schema/v1/m.call.candidates
index 93c024ee2..185dd2672 100644
--- a/event-schemas/schema/v1/m.call.candidates
+++ b/event-schemas/schema/v1/m.call.candidates
@@ -1,6 +1,7 @@
 {
     "$schema": "http://json-schema.org/draft-04/schema#",
     "type": "object",
+    "description": "This event is sent by callers after sending an invite and by the callee after answering. Its purpose is to give the other party additional ICE candidates to try using to communicate.",
     "allOf": [{
         "$ref": "core#/definitions/room_event"
     }],
diff --git a/event-schemas/schema/v1/m.call.invite b/event-schemas/schema/v1/m.call.invite
index a2aa98a30..44f998f18 100644
--- a/event-schemas/schema/v1/m.call.invite
+++ b/event-schemas/schema/v1/m.call.invite
@@ -1,6 +1,7 @@
 {
     "$schema": "http://json-schema.org/draft-04/schema#",
     "type": "object",
+    "description": "This event is sent by the caller when they wish to establish a call.",
     "allOf": [{
         "$ref": "core#/definitions/room_event"
     }],