# Agent BUilder MCP problem

**URL:** <https://community.openai.com/t/agent-builder-mcp-problem/1361698>\
**Category:** Bugs\
**Created:** [October 9, 2025, 11:49am UTC](https://community.openai.com/t/agent-builder-mcp-problem/1361698 "2025-10-09T11:49:10Z")\
**Posts on this page:** 1\
**Showing post:** 8

<div class="post-metadata">

**Author:** ![che.kulhan](https://sea2.discourse-cdn.com/openai1/user_avatar/community.openai.com/che.kulhan/32/357845_2.png) [@che.kulhan](https://community.openai.com/u/che.kulhan)\
**Post date:** [April 23, 2026, 2:45pm UTC](https://community.openai.com/t/agent-builder-mcp-problem/1361698/8 "2026-04-23T14:45:54Z")

</div>

> [@OpenAI\_Support](#):
>
> output\_parsed

Thanks for that. I was successfully able to pass the input data from the Agent to the MCP Server via a Transform object.

I noticed that only one MCP tool can be called when it is done this way using the MCP component. One cannot select multiple function calls…A little limiting, in my opinion.

In addition, another Agent must be used after the MCP Tool to display the result. Seems like a lot of components required, just to display a simple tools call.

I have built and hosted this demo MCP Sever using AWS Bedrock Agent Code tools, so good to see that these can be integrated into Agent Builder for future projects.

 ![Screenshot 2026-04-23 at 16.40.00](https://us1.discourse-cdn.com/openai1/original/4X/1/3/3/133c984ac97b7f54e6ab9b29bd31ced176b83bdd.png)

 ![Screenshot 2026-04-23 at 16.41.51](https://us1.discourse-cdn.com/openai1/original/4X/0/7/1/071f04bce63d2ff9053b1965a60f1620f7a2d95f.png)

---

_[View the full topic](https://community.openai.com/t/agent-builder-mcp-problem/1361698)._