add comment referencing core AI SDK's prepareToolsAndToolChoice

Author: iNishant

packages/ai/src/agent/tools-to-model-tools.ts

@@ -1,6 +1,8 @@
 import type { LanguageModelV2FunctionTool } from '@ai-sdk/provider';
 import { asSchema, type ToolSet } from 'ai';
 
+// Mirrors the tool→LanguageModelV2FunctionTool mapping in the core AI SDK's
+// prepareToolsAndToolChoice (ai/src/prompt/prepare-tools-and-tool-choice.ts).
 export function toolsToModelTools(
   tools: ToolSet
 ): LanguageModelV2FunctionTool[] {