fn register_mcp_probe(engine: &Arc<WshRpcEngine>, state: &AppState)Expand description
Health/prerequisite probe for one of this agent’s own or bound-global
servers (SPEC_MCP_INTEGRATION_PARITY_ABLETON_PILOT_2026_07_08.md §4.4).
Opens a short-lived MCP connection and reports whether the server
actually speaks the protocol — distinct from mcp.upsert’s “is this
valid JSON” check, which tells you nothing about reachability.