diff --git a/datasette/templates/debug_allowed.html b/datasette/templates/debug_allowed.html
index 9483926b..b06e1faf 100644
--- a/datasette/templates/debug_allowed.html
+++ b/datasette/templates/debug_allowed.html
@@ -42,7 +42,7 @@
         <div class="form-section">
             <label for="child">Filter by child (optional):</label>
             <input type="text" id="child" name="child" placeholder="e.g., table name">
-            <small>Filter results to a specific child resource (requires parent)</small>
+            <small>Filter results to a specific child resource (requires parent to be set)</small>
         </div>
 
         <div class="form-section">
@@ -236,12 +236,15 @@ function displayError(data) {
 const parentInput = document.getElementById('parent');
 const childInput = document.getElementById('child');
 
-childInput.addEventListener('focus', () => {
+parentInput.addEventListener('input', () => {
+    childInput.disabled = !parentInput.value;
     if (!parentInput.value) {
-        alert('Please specify a parent resource first before filtering by child resource.');
-        parentInput.focus();
+        childInput.value = '';
     }
 });
+
+// Initialize disabled state
+childInput.disabled = !parentInput.value;
 </script>
 
 {% endblock %}
diff --git a/datasette/views/special.py b/datasette/views/special.py
index ca155a04..e896becc 100644
--- a/datasette/views/special.py
+++ b/datasette/views/special.py
@@ -189,22 +189,6 @@ class AllowedResourcesView(BaseView):
     name = "allowed"
     has_json_alternate = False
 
-    CANDIDATE_SQL = {
-        "view-table": (
-            "SELECT database_name AS parent, table_name AS child FROM catalog_tables",
-            {},
-        ),
-        "view-database": (
-            "SELECT database_name AS parent, NULL AS child FROM catalog_databases",
-            {},
-        ),
-        "view-instance": ("SELECT NULL AS parent, NULL AS child", {}),
-        "execute-sql": (
-            "SELECT database_name AS parent, NULL AS child FROM catalog_databases",
-            {},
-        ),
-    }
-
     async def get(self, request):
         await self.ds.refresh_schemas()
 
@@ -218,11 +202,29 @@ class AllowedResourcesView(BaseView):
 
         if not as_format:
             # Render the HTML form (even if query parameters are present)
+            # Put most common/interesting actions first
+            priority_actions = [
+                "view-instance",
+                "view-database",
+                "view-table",
+                "view-query",
+                "execute-sql",
+                "insert-row",
+                "update-row",
+                "delete-row",
+            ]
+            actions = list(self.ds.actions.keys())
+            # Priority actions first (in order), then remaining alphabetically
+            sorted_actions = [a for a in priority_actions if a in actions]
+            sorted_actions.extend(
+                sorted(a for a in actions if a not in priority_actions)
+            )
+
             return await self.render(
                 ["debug_allowed.html"],
                 request,
                 {
-                    "supported_actions": sorted(self.CANDIDATE_SQL.keys()),
+                    "supported_actions": sorted_actions,
                 },
             )
 
@@ -232,11 +234,6 @@ class AllowedResourcesView(BaseView):
             return Response.json({"error": "action parameter is required"}, status=400)
         if action not in self.ds.actions:
             return Response.json({"error": f"Unknown action: {action}"}, status=404)
-        if action not in self.CANDIDATE_SQL:
-            return Response.json(
-                {"error": f"Action '{action}' is not supported by this endpoint"},
-                status=400,
-            )
 
         actor = request.actor if isinstance(request.actor, dict) else None
         actor_id = actor.get("id") if actor else None
diff --git a/tests/test_permission_endpoints.py b/tests/test_permission_endpoints.py
index a1aa4578..65280a06 100644
--- a/tests/test_permission_endpoints.py
+++ b/tests/test_permission_endpoints.py
@@ -69,8 +69,12 @@ async def ds_with_permissions():
         ("/-/allowed.json", 400, {"error"}),
         # Invalid action
         ("/-/allowed.json?action=nonexistent", 404, {"error"}),
-        # Unsupported action (valid but not in CANDIDATE_SQL)
-        ("/-/allowed.json?action=insert-row", 400, {"error"}),
+        # Any valid action works, even if no permission rules exist for it
+        (
+            "/-/allowed.json?action=insert-row",
+            200,
+            {"action", "items", "total", "page"},
+        ),
     ],
 )
 async def test_allowed_json_basic(