Added links to previous community-contributed use cases.

Author: Scott Lewis

docs/use-cases.md

@@ -6,3 +6,17 @@ Use Cases |
 [Experimental Findings](experimental-findings.md) |
 [Related Work](related-work.md) |
 [Contributing](../CONTRIBUTING.md) 
+
+[Community-provided use cases](https://github.com/modelcontextprotocol/modelcontextprotocol/discussions/177)
+
+Other Community-Provided Use Cases from Other Discussions
+
+[Server Governance](https://github.com/modelcontextprotocol/modelcontextprotocol/discussions/1567#discussioncomment-14895158)
+
+[Agent<->Server Interaction](https://github.com/modelcontextprotocol/modelcontextprotocol/discussions/1567#discussioncomment-14929142)
+
+[User Context Filtering](https://github.com/modelcontextprotocol/modelcontextprotocol/discussions/1567#discussioncomment-15184260)
+
+[Groups for Composition](https://github.com/modelcontextprotocol/modelcontextprotocol/discussions/1567#discussioncomment-15294141)
+
+[Tool Consolidation/Namespace](https://github.com/modelcontextprotocol/modelcontextprotocol/discussions/1567#discussioncomment-15764478)