Revert "Revert "Enable parallel tool calling with new_task isolation safeguards"" (RooCodeInc#11006)

Author: mrubens

src/core/prompts/tools/native-tools/new_task.ts

@@ -1,6 +1,8 @@
 import type OpenAI from "openai"
 
-const NEW_TASK_DESCRIPTION = `This will let you create a new task instance in the chosen mode using your provided message and initial todo list (if required).`
+const NEW_TASK_DESCRIPTION = `Create a new task instance in the chosen mode using your provided message and initial todo list (if required).
+
+CRITICAL: This tool MUST be called alone. Do NOT call this tool alongside other tools in the same message turn. If you need to gather information before delegating, use other tools in a separate turn first, then call new_task by itself in the next turn.`
 
 const MODE_PARAMETER_DESCRIPTION = `Slug of the mode to begin the new task in (e.g., code, debug, architect)`