diff --git a/llm/cli.py b/llm/cli.py
index 18087bcd..e0e4d1a5 100644
--- a/llm/cli.py
+++ b/llm/cli.py
@@ -171,7 +171,7 @@ def read_prompt():
         template_obj = load_template(template)
         prompt = read_prompt()
         try:
-            prompt, system = template_obj.execute(prompt, params)
+            prompt, system = template_obj.evaluate(prompt, params)
         except Template.MissingVariables as ex:
             raise click.ClickException(str(ex))
         if model_id is None and template_obj.model:
diff --git a/llm/templates.py b/llm/templates.py
index 6885fe38..4a18a44e 100644
--- a/llm/templates.py
+++ b/llm/templates.py
@@ -1,6 +1,6 @@
 from pydantic import ConfigDict, BaseModel
 import string
-from typing import Optional
+from typing import Optional, Any, Dict, List, Tuple
 
 
 class Template(BaseModel):
@@ -8,19 +8,23 @@ class Template(BaseModel):
     prompt: Optional[str] = None
     system: Optional[str] = None
     model: Optional[str] = None
-    defaults: Optional[dict] = None
+    defaults: Optional[Dict[str, Any]] = None
     model_config = ConfigDict(extra="forbid")
 
     class MissingVariables(Exception):
         pass
 
-    def execute(self, input, params=None):
+    def evaluate(
+        self, input: str, params: Optional[Dict[str, Any]] = None
+    ) -> Tuple[Optional[str], Optional[str]]:
         params = params or {}
         params["input"] = input
         if self.defaults:
             for k, v in self.defaults.items():
                 if k not in params:
                     params[k] = v
+        prompt: Optional[str] = None
+        system: Optional[str] = None
         if not self.prompt:
             system = self.interpolate(self.system, params)
             prompt = input
@@ -30,7 +34,7 @@ def execute(self, input, params=None):
         return prompt, system
 
     @classmethod
-    def interpolate(cls, text, params):
+    def interpolate(cls, text: Optional[str], params: Dict[str, Any]) -> Optional[str]:
         if not text:
             return text
         # Confirm all variables in text are provided
@@ -44,7 +48,7 @@ def interpolate(cls, text, params):
         return string_template.substitute(**params)
 
     @staticmethod
-    def extract_vars(string_template):
+    def extract_vars(string_template: string.Template) -> List[str]:
         return [
             match.group("named")
             for match in string_template.pattern.finditer(string_template.template)
diff --git a/tests/test_templates.py b/tests/test_templates.py
index 5ca22827..08e6c424 100644
--- a/tests/test_templates.py
+++ b/tests/test_templates.py
@@ -27,16 +27,16 @@
         ),
     ),
 )
-def test_template_execute(
+def test_template_evaluate(
     prompt, system, defaults, params, expected_prompt, expected_system, expected_error
 ):
     t = Template(name="t", prompt=prompt, system=system, defaults=defaults)
     if expected_error:
         with pytest.raises(Template.MissingVariables) as ex:
-            prompt, system = t.execute("input", params)
+            prompt, system = t.evaluate("input", params)
         assert ex.value.args[0] == expected_error
     else:
-        prompt, system = t.execute("input", params)
+        prompt, system = t.evaluate("input", params)
         assert prompt == expected_prompt
         assert system == expected_system