update description in docs

Author: msukkari

docs/docs/overview.mdx

@@ -2,10 +2,11 @@
 title: "Overview"
 ---
 
-[Sourcebot](https://github.com/sourcebot-dev/sourcebot) is a self-hosted tool that helps you understand your codebase. 
+[Sourcebot](https://github.com/sourcebot-dev/sourcebot) is a platform that helps humans and agents understand your codebase:
 
 - [Code search](/docs/features/search/overview): Search and navigate across all your repos and branches, no matter where they’re hosted
 - [Ask Sourcebot](/docs/features/ask): Ask questions about your codebase and have Sourcebot provide detailed answers grounded with inline citations
+- [MCP](/docs/features/mcp-server): Enrich agent context windows with code across your organization
 
 <CardGroup>
 <Card title="Deployment guide" icon="server" href="/docs/deployment-guide" horizontal="true">