Function add_lead_tools 

pub(crate) fn add_lead_tools(
    builder: McpServerBuilder,
    facade: Arc<dyn WorkerFacade>,
    slot: SessionSlot,
) -> McpServerBuilder

Attach the four lead-only verbs to an existing McpServerBuilder. Each acts on the caller’s own project, so a worker has no project to act on and is not offered the surface.