tools/ReadAudioTool.py

from smolagents.tools import Tool

class ReadAudioTool(Tool):
    name = "read_audio"
    description = "Reads an audio file and returns base64 so Gemini can transcribe it."
    inputs = {
        "file_path": {
            "type": "string",
            "description": "The full path of the text file to read"
        }
    }
    output_type = "string"

    def forward(self, file_path: str) -> str:
        with open(file_path, "rb") as aud:
            return base64.b64encode(aud.read()).decode("utf-8")