diff --git a/tools.py b/tools.py
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index 0000000..61fe21a
--- /dev/null
+++ b/tools.py
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+"""
+Utility tools used by the agent.
+
+The assignment requires a single tool – ``get_weather`` – that returns a short
+string describing the weather for a given city and date.  In a real project this
+would call an external API, but for the purposes of the homework we return a
+hard‑coded string so that the repository is self‑contained.
+"""
+import json
+from typing import Dict
+
+def get_weather(city: str = "Москва", date: str = "сегодня") -> str:
+    """Return a mock weather description.
+
+    Parameters
+    ----------
+    city : str, optional
+        Name of the city.  Defaults to ``"Москва"``.
+    date : str, optional
+        Date for which the forecast is requested.  Defaults to ``"сегодня"``.
+
+    Returns
+    -------
+    str
+        A short human‑readable weather report.
+    """
+    # In a real implementation we would query an API here.
+    return f"В городе {city} на {date} ожидается солнечная погода с температурой 25°C."
+
+__all__ = ["get_weather"]