Issue with parallel tool calls with same name

[akshaylive]

Here's a gnarly bug/issue..

Scenario:

1. LLM invokes multiple instances of the same tool, such as ["Web Search", "Web Search"]
2. This line schedules multiple tool nodes to run in parallel.
3. Each tool node picks up the first matching tool call and here from the state -- this means that both of the web search tools will execute the first tool call.
4. The fix is to use the langgraph send pattern here. Here's an old PR but you can use the same patterns here! 🙂

[akshaylive]

This was fixed with the sequential execution change.