#14333 [Feature]: List access groups for each tool in /mcp-rest/tools/list
### The Feature
We need to be able to discover defined MCP groups (so we dont have to keep a list of them manually). The /mcp-rest/tools/list endpoint does not appear to mention the access groups of each tool and I dont see another endpoint that would provide that information in /mcp_server/rest_endpoints.py
### Motivation, pitch
Allow MCP group discovery
### LiteLLM is hiring a founding backend engineer, are you interested in joining us and shipping to all our users?
No
### Twitter / LinkedIn details
_No response_