Changing tools depending on state in create_react_agent

[maxfriedrich]

Hi, in our agent, we would like to change the available tools depending on the state, e.g.

• removing all tools and forcing the agent to answer if it's out of steps (returning a partial answer instead of stopping completely)
• allowing only a certain number of calls to an expensive tool
• giving the ability to run a tool only after some other tool has been called
• ...

We can of course build our own ReAct-style agent that has this feature but I was wondering if this would this make sense to add to create_react_agent. I imagine something like passing a Callable[[StateSchema], Tools] to the tools=... parameter that is evaluated before each turn.

Curious what you think!

[savvaki]

Perhaps this would be of some help, tools are dynamically selected at runtime: https://github.com/langchain-ai/langgraph-bigtool