Is there a way to add tools in a LLM different to OpenAI like Gemini?

[RicardoRobledo]

I need to make an app using LangGraph and add tools in a LLM, but seems that only OpenAI do it

from langchain.tools.render import format_tool_to_openai_function
from langchain_google_genai import ChatGoogleGenerativeAI


llm = ChatGoogleGenerativeAI(model="gemini-pro")

@tool
def sum():
    'Do a sum'
    return 2+2

tools = [sum]


# Bind the functions
model = llm.bind(tools=tools)
model.invoke('Do a sum') #----> TypeError: ("Expected an instance of `genai.FunctionDeclaraionType`. Got a:\n  type(fun)=<class 'tuple'>\n", ('name', 'sum'))```