diff --git a/src/features/background-agent/manager.ts b/src/features/background-agent/manager.ts
index e7b14f49c..83d28fa2e 100644
--- a/src/features/background-agent/manager.ts
+++ b/src/features/background-agent/manager.ts
@@ -152,6 +152,8 @@ export class BackgroundManager {
         system: input.skillContent,
         tools: {
           task: false,
+          sisyphus_task: false,
+          call_omo_agent: true,
         },
         parts: [{ type: "text", text: input.prompt }],
       },
@@ -312,6 +314,8 @@ export class BackgroundManager {
         agent: existingTask.agent,
         tools: {
           task: false,
+          sisyphus_task: false,
+          call_omo_agent: true,
         },
         parts: [{ type: "text", text: input.prompt }],
       },
diff --git a/src/tools/sisyphus-task/tools.ts b/src/tools/sisyphus-task/tools.ts
index 060f04213..980744c50 100644
--- a/src/tools/sisyphus-task/tools.ts
+++ b/src/tools/sisyphus-task/tools.ts
@@ -223,6 +223,7 @@ Use \`background_output\` with task_id="${task.id}" to check progress.`
               tools: {
                 task: false,
                 sisyphus_task: false,
+                call_omo_agent: true,
               },
               parts: [{ type: "text", text: args.prompt }],
             },
@@ -446,6 +447,7 @@ System notifies on completion. Use \`background_output\` with task_id="${task.id
               tools: {
                 task: false,
                 sisyphus_task: false,
+                call_omo_agent: true,
               },
               parts: [{ type: "text", text: args.prompt }],
               ...(categoryModel ? { model: categoryModel } : {}),