docs(meta-ads): add manual description section to docs

Author: waleedlatif1

apps/docs/content/docs/en/tools/meta_ads.mdx

@@ -5,11 +5,17 @@ description: Query campaigns, ad sets, ads, and performance insights
 
 import { BlockInfoCard } from "@/components/ui/block-info-card"
 
-<BlockInfoCard 
+<BlockInfoCard
   type="meta_ads"
   color="#1877F2"
 />
 
+{/* MANUAL-CONTENT-START:intro */}
+[Meta Ads](https://www.facebook.com/business/ads) is Meta's advertising platform that lets businesses create and manage ads across Facebook, Instagram, Messenger, and the Audience Network. It offers campaign management at multiple levels — campaigns, ad sets, and individual ads — with detailed targeting, budgeting, and performance analytics.
+
+In Sim, the Meta Ads integration enables your agents to query account information, browse campaign hierarchies, and pull performance insights including impressions, clicks, spend, CTR, CPC, CPM, reach, frequency, and conversions. This supports use cases such as automated performance reporting, spend monitoring, campaign auditing, and cross-channel analytics workflows. Account and campaign selectors provide a dropdown experience so agents and users can pick resources without manually entering IDs.
+{/* MANUAL-CONTENT-END */}
+
 ## Usage Instructions
 
 Connect to Meta Ads to view account info, list campaigns, ad sets, and ads, and get performance insights and metrics.