Creating Custom LangChain Tools

AI agents are powerful, but sometimes they need to perform very specific actions that aren't covered by standard tools. This is where custom tools come in!

Custom tools allow your agent to interact with unique APIs, proprietary databases, or perform highly specialized calculations tailored to your application.

In LangChain, a Tool is essentially a function that an agent can call to perform a specific action. Think of it as an item in the agent's utility belt.

• It takes a single string input (e.g., a query, a number).
• It returns a single string output (e.g., a result, an error message).
• The agent uses the tool's description to decide when and how to use it.