Live release-plan eval starts without configured Azure SDK MCP tools #17363

The existing live release-plan eval on main starts successfully with gpt-6.1-sol, but no MCP servers are registered, so the workflow cannot run.

Evidence

• Pipeline run 6983285 — main commit ece99a752a0d43d0e6d72c294aedd60021bf12e4.
• Eval task log: model gpt-6.1-sol, 3 tool calls, score 20% (80% required).
• Run artifact eval-debug-area_release_plan-1, file otel-spans.jsonl: all four invoke_agent spans report github.copilot.context.mcp_server_names: [].
• events.jsonl contains only three skill calls. The agent reports: “I can’t create the release plan because the required azure-sdk-mcp server isn’t available.”

Expected: the configured azsdk-mcp-live environment exposes the real Azure SDK MCP tools to the agent. No release plans, generation pipelines, or SDK PRs were created. The cause of the missing MCP registration is not yet established.