diff --git a/index.bs b/index.bs
index 4274a31..0cdf081 100644
--- a/index.bs
+++ b/index.bs
@@ -407,20 +407,9 @@ The <dfn method for=ModelContext>registerTool(<var>tool</var>, <var>options</var
      </ol>
    </div>
 
-1. Let |promise| be [=a new promise=] created in [=this=]'s [=relevant realm=].
-
-1. If |options|'s {{ModelContextRegisterToolOptions/signal}} [=map/exists=], then:
-
-   1. Let |signal| be |options|'s {{ModelContextRegisterToolOptions/signal}}.
-
-   1. If |signal| is [=AbortSignal/aborted=], then return [=a promise rejected with=]
-      |signal|'s [=AbortSignal/abort reason=].
-
-   1. [=AbortSignal/add|Add the following abort steps=] to |signal|:
-
-        1. [=model context/Unregister a tool=] given [=this=] and |tool name|.
-
-        1. [=Reject=] |promise| with |signal|'s [=AbortSignal/abort reason=].
+1. If |options|'s {{ModelContextRegisterToolOptions/signal}} [=map/exists=] and is
+   [=AbortSignal/aborted=], then return [=a promise rejected with=] |options|'s
+   {{ModelContextRegisterToolOptions/signal}}'s [=AbortSignal/abort reason=].
 
 1. Let |exposed origins| be an empty [=list=] of [=origins=].
 
@@ -436,6 +425,21 @@ The <dfn method for=ModelContext>registerTool(<var>tool</var>, <var>options</var
 
           1. [=list/Append=] |parsedURL|'s [=url/origin=] to |exposed origins|.
 
+1. Let |promise| be [=a new promise=] created in [=this=]'s [=relevant realm=].
+
+1. If |options|'s {{ModelContextRegisterToolOptions/signal}} [=map/exists=], then:
+
+   1. Let |signal| be |options|'s {{ModelContextRegisterToolOptions/signal}}.
+
+   1. If |signal| is [=AbortSignal/aborted=], then return [=a promise rejected with=]
+      |signal|'s [=AbortSignal/abort reason=].
+
+   1. [=AbortSignal/add|Add the following abort steps=] to |signal|:
+
+        1. [=model context/Unregister a tool=] given [=this=] and |tool name|.
+
+        1. [=Reject=] |promise| with |signal|'s [=AbortSignal/abort reason=].
+
 1. Let |tool definition| be a new [=tool definition=], with the following [=struct/items=]:
 
    : [=tool definition/name=]
@@ -669,17 +673,17 @@ definition itself.
 
 <xmp class="idl">
 dictionary ModelContextRegisterToolOptions {
-  AbortSignal signal;
   sequence<USVString> exposedTo;
+  AbortSignal signal;
 };
 </xmp>
 
 <dl class="domintro">
+  : <code><var ignore>options</var>["{{ModelContextRegisterToolOptions/exposedTo}}"]</code>
+  :: An array of origins that control which documents this tool is exposed to, in the current document's tree.
+
   : <code><var ignore>options</var>["{{ModelContextRegisterToolOptions/signal}}"]</code>
   :: An {{AbortSignal}} that unregisters the tool when aborted.
-
-  : <code><var ignore>options</var>["{{ModelContextRegisterToolOptions/exposedTo}}"]</code>
-  :: <p>An array of origins that control which documents this tool is exposed to, in the current document's tree.
 </dl>
 
 <h4 id="model-context-get-tool-options">ModelContextGetToolOptions Dictionary</h4>