React Agents sometimes fail if they only have one tool

[bborn]

I've seen this a few times: if an agent only has one tool, it will sometimes do this:

Action Input: Some input
Observation: [Tool Name] is not a valid tool

I think it's getting confused because the list of available tools only has one item, so it thinks the entire tool is called [Tool Name] instead of Tool Name

(And sorry for saying "thinks" - I know it doesn't think but it just sort of makes sense to describe it that way)

[chris-aeviator]

this reliably happens to me if only one tool is present

[sonnguyen-TS]

This also happens to me when I use only one tool (PythonREPLTool). The chain doesn't recognise it and assign to "Invalid tool". When I add an extra tool like Wikipedia, the the problem's solved.

[dosubot]

Hi, @bborn! I'm Dosu, and I'm helping the LangChain team manage their backlog. I wanted to let you know that we are marking this issue as stale.

Based on my understanding, the issue you reported is about React Agents failing when they only have one tool because the list of available tools is not being handled correctly. It seems that chris-aeviator, mikeyang01, and sonnguyen-TS have also experienced this issue. Sonnguyen-TS found that adding an extra tool resolved the problem.

Before we close this issue, we wanted to check with you if it is still relevant to the latest version of the LangChain repository. If it is, please let us know by commenting on this issue. Otherwise, feel free to close the issue yourself, or it will be automatically closed in 7 days.

Thank you for your contribution to LangChain!