Choose traces and candidate models

Input: one classified workload and its selection_reference (from metergraph-workloads). Output: a run plan the person can approve in one reply.

0. Discover what this agent can use

Skip this when the conversation has already done it. The metergraph CLI and the Agent Access MCP server reach the same tools with the same key. Use whichever this agent has, and never tell the person the other one is missing.