Isn’t that ChatGPT’s internal MCP tools?

It's one of the tools that are available to ChatGPT - they're not MCP tools because ChatGPT's implementation of tools pre-dates MCP, but they work effectively the same way.

Here's a full list which looks accurate to me: https://chatgpt.com/share/6977ffa0-df14-8006-9647-2b8c90ccbb...