diff --git a/backend/Services/NexusMcpTools.cs b/backend/Services/NexusMcpTools.cs
index c35dc3d..28dd484 100644
--- a/backend/Services/NexusMcpTools.cs
+++ b/backend/Services/NexusMcpTools.cs
@@ -15,6 +15,8 @@ public sealed class NexusMcpTools(
     IConfiguration configuration,
     ILogger<NexusMcpTools> logger)
 {
+    // ── P1b: Read-only MCP Tools (TaskBridgeService facade) ──
+
     [McpServerTool(Name = "nexus_get_board")]
     [Description("Get the full Nexus task board grouped by canonical states.")]
     public async Task<BoardResponse> GetBoard(CancellationToken ct = default)
@@ -59,6 +61,8 @@ public sealed class NexusMcpTools(
         return activity.Select(entry => new ActivityEntryDto(entry.Id, entry.Type, entry.Message, entry.CreatedAt)).ToList();
     }
 
+    // ── P1c: Mutating MCP Tools ──
+
     [McpServerTool(Name = "nexus_create_task")]
     [Description("Create a top-level Nexus task.")]
     public async Task<TaskBridgeCommandResponse<DashboardTaskDto>> CreateTask(