diff --git a/src/ClaudeDo.Worker/External/ExternalMcpService.cs b/src/ClaudeDo.Worker/External/ExternalMcpService.cs
index 4550988..c8aede6 100644
--- a/src/ClaudeDo.Worker/External/ExternalMcpService.cs
+++ b/src/ClaudeDo.Worker/External/ExternalMcpService.cs
@@ -10,6 +10,8 @@ using TaskStatus = ClaudeDo.Data.Models.TaskStatus;
 namespace ClaudeDo.Worker.External;
 
 public sealed record TaskListDto(string Id, string Name, string? WorkingDir);
+public sealed record DeleteTaskResult(bool Deleted, string Id);
+public sealed record CancelTaskResult(bool Cancelled, string Id);
 
 public sealed record TaskDto(
     string Id,
@@ -206,16 +208,16 @@ public sealed class ExternalMcpService
         await _broadcaster.TaskUpdated(taskId);
     }
 
-    [McpServerTool, Description("Cancel a running task. Returns true if the task was running and cancellation was requested.")]
-    public async Task<bool> CancelTask(string taskId, CancellationToken cancellationToken)
+    [McpServerTool, Description("Cancel a running task. Returns { cancelled: true, id } if the task was running and cancellation was requested; cancelled is false if the task was not running.")]
+    public async Task<CancelTaskResult> CancelTask(string taskId, CancellationToken cancellationToken)
     {
         var cancelled = _queue.CancelTask(taskId);
         if (cancelled) await _broadcaster.TaskUpdated(taskId);
-        return cancelled;
+        return new CancelTaskResult(cancelled, taskId);
     }
 
-    [McpServerTool, Description("Delete a task. Refuses if the task is currently Running — cancel it first.")]
-    public async Task DeleteTask(string taskId, CancellationToken cancellationToken)
+    [McpServerTool, Description("Delete a task. Returns { deleted: true, id } on success. Throws if the task is not found or is currently Running — cancel it first.")]
+    public async Task<DeleteTaskResult> DeleteTask(string taskId, CancellationToken cancellationToken)
     {
         var task = await _tasks.GetByIdAsync(taskId, cancellationToken)
             ?? throw new InvalidOperationException($"Task {taskId} not found.");
@@ -224,6 +226,7 @@ public sealed class ExternalMcpService
 
         await _tasks.DeleteAsync(taskId, cancellationToken);
         await _broadcaster.TaskUpdated(taskId);
+        return new DeleteTaskResult(true, taskId);
     }
 
     private static TaskDto ToDto(TaskEntity t) => new(