docs(agent): document the tool Permission Mode control

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: j15z

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/editor/components/sub-block/components/tool-input/components/tools/usage-control.tsx

@@ -35,6 +35,11 @@ const MODE_OPTIONS = [
   },
 ] as const
 
+/**
+ * Permission Mode control for one agent tool. Selector mode picks a fixed `usageControl`, and
+ * Variable mode edits a `usageControlExpression` that must resolve to auto, force, or none.
+ * Both values are kept so toggling modes does not discard the inactive one.
+ */
 export function ToolUsageControl({
   blockId,
   aggregateSubBlockId,