AI Integration node - functions:
1. Function arguments: the AI calls our function, but the argument value
shows "null" in the next Message node ({image_url}). Is this a known
issue with a fix planned? What is the exact syntax to read an argument?
2. After a function's Message node, how do we return to the AI node
without a loop? Linked back to the AI node, the AI called the same
function 6 times in a row.
3. Is there a length limit for the function description? Text over about
250 characters was saved as empty, with no error.
4. Is there a limit on MCP tool calls per reply, or a tool timeout?