When working on #10644, I realized that some code snippets (in docs and docstrings) for OpenAPIServiceConnector and OpenAPIServiceToFunctions do not work.

These components were created a long time ago, and we haven't kept the docs and docstrings up to date. However, tests pass, so it is possible to fix them.

My first impression is that those components are legacy, and most of their functionalities can now be covered by MCP. So we might consider deprecating them.

If we decide to keep them, we should improve their documentation by testing all snippets in docs and docstrings and fixing/modernizing them.