Returning values from mcp tool is not working

There is no way to return values from the function to the caller.
Tried to return a sting/interger both did not return values to the caller.

Start by reproducing the issue in the remote MCP server quickstart with a tool that returns a string and one that returns an integer. Trace the tool return path from the Java Azure Functions entry point to the caller; done means both values are returned successfully and the behavior is covered by a regression test.

Written by the indexing model from the issue text.