1 files changed, 62 insertions, 0 deletions
diff --git a/personal_agent/tools/calculator.py b/personal_agent/tools/calculator.py
new file mode 100644
index 0000000..dee8b77
--- /dev/null
+++ b/personal_agent/tools/calculator.py
@@ -0,0 +1,62 @@
+from personal_agent.tools.base import Tool, ToolError, ToolResult
+
+
+class CalculatorTool(Tool):
+    @property
+    def name(self) -> str:
+        return "calculator"
+
+    @property
+    def description(self) -> str:
+        return "Perform basic arithemtic"
+
+    @property
+    def schema(self) -> dict[str, object]:
+        return {
+            "type": "object",
+            "properties": {
+                "a": {
+                    "type": "number",
+                    "description": "The first number.",
+                },
+                "b": {
+                    "type": "number",
+                    "description": "The second number.",
+                },
+                "operation": {
+                    "type": "string",
+                    "enum": ["add", "subtract", "multiply", "divide"],
+                    "description": "The arithemtic operation to perform",
+                },
+            },
+            "required": ["a", "b", "operation"],
+        }
+
+    def execute(self, arguments: dict[str, object]) -> ToolResult:
+        a = arguments["a"]
+        b = arguments["b"]
+        operation = arguments["operation"]
+
+        if not isinstance(a, (int, float)):
+            raise ToolError("a must be a number")
+
+        if not isinstance(b, (int, float)):
+            raise ToolError("b must be a number")
+
+        if not isinstance(operation, str):
+            raise ToolError("operation must be a string")
+
+        if operation == "add":
+            result = a + b
+        elif operation == "subtract":
+            result = a - b
+        elif operation == "multiply":
+            result = a * b
+        elif operation == "divide":
+            if b == 0:
+                raise ToolError("cannot divide by zero")
+            result = a / b
+        else:
+            raise ToolError(f"unknown operation: {operation}")
+
+        return ToolResult(content=str(result))