fix(tools): harden tool schemas for strict providers

src/agents/tools/discord-actions-guild.ts

@@ -31,6 +31,7 @@ import {
 function readParentIdParam(
   params: Record<string, unknown>,
 ): string | null | undefined {
+  if (params.clearParent === true) return null;
   if (params.parentId === null) return null;
   return readStringParam(params, "parentId");
 }