diff --git a/proto/protocol.xml b/proto/protocol.xml
index 3332d24..54f3e6e 100644
--- a/proto/protocol.xml
+++ b/proto/protocol.xml
@@ -587,10 +587,9 @@
       <description summary="Device start emulating request">
         Notify the EIS implementation that the given device is about to start
         sending events. This should be seen more as a transactional boundary than a
-        time-based boundary. The primary use-cases for this are to allow for setup on
-        the EIS implementation side and/or UI updates to indicate that a device is
-        sending events now and for out-of-band information to sync with a given event
-        sequence.
+        time-based boundary. The primary use-case for this is UI updates to indicate
+        that a device is sending events now and for out-of-band information to sync
+        with a given event sequence.
 
         There is no actual requirement that events start immediately once emulation
         starts and there is no requirement that a client calls ei_device.stop_emulating
@@ -607,6 +606,8 @@
 
         It is a protocol violation to request ei_device.start_emulating after
         ei_device.start_emulating without an intermediate stop_emulating.
+        It is a protocol violation to request ei_device.start_emulating without
+        having previously sent ei_device.ready.
 
         It is a protocol violation to send this request for a client
         of an ei_handshake.context_type other than sender.
@@ -648,6 +649,23 @@
       <arg name="timestamp" type="uint64" summary="timestamp in microseconds"/>
     </request>
 
+    <!-- ei_device client requests version 3 -->
+
+    <request name="ready" since="3" context_type="sender">
+      <description summary="Device ready request">
+        Notification that the client has completed setup of this device.
+
+        This request denotes the end of device setup. It serves a similar role
+        as ei_device.done, except from the client's point of view. All required
+        interface-specific setup requests (if any) must be sent prior to this
+        request.
+
+        A client may not send ei_device.start_emulating until after this request
+        has been sent.
+      </description>
+      <arg name="last_serial" type="uint32" summary="the last serial sent by the EIS implementation"/>
+    </request>
+
     <!-- ei_device events version 1 -->
 
     <event name="destroyed" type="destructor" since="1">
@@ -1612,7 +1630,7 @@
       required to negotiate tool capabilities. Negotiation is performed by the
       server first sending ei_stylus.tool_capabilities prior to ei_device.done
       and then the client responding with ei_stylus.bind_tool_capabilities
-      prior to starting emulation for the first time.
+      prior to ei_device.ready.
 
       This interface may be used on both ei_device.device_type.virtual and
       ei_device.device_type.physical devices. As an interface with absolute