Support tool config in yaml

tests/test_agent_config.py

@@ -202,3 +202,51 @@ def test_agent_yaml_missing_env_reference_fails(monkeypatch, tmp_path):
 
     with pytest.raises(ValueError, match="Missing environment variable"):
         load_settings(argv=["--agent-config", str(file_path)])
+
+
+def test_agent_yaml_tools_list_is_loaded(monkeypatch, tmp_path):
+    monkeypatch.chdir(tmp_path)
+    file_path = tmp_path / "tools-agent.yaml"
+    _write_yaml(
+        file_path,
+        _full_agent_yaml()
+        + """
+
+  tools:
+    - current_time
+    - name: weather
+      description: Get weather by city.
+      parameters:
+        type: object
+        properties:
+          city:
+            type: string
+        required: [city]
+      executor: server
+""",
+    )
+
+    settings = load_settings(argv=["--agent-config", str(file_path)])
+
+    assert isinstance(settings.tools, list)
+    assert settings.tools[0] == "current_time"
+    assert settings.tools[1]["name"] == "weather"
+    assert settings.tools[1]["executor"] == "server"
+
+
+def test_agent_yaml_tools_must_be_list(monkeypatch, tmp_path):
+    monkeypatch.chdir(tmp_path)
+    file_path = tmp_path / "bad-tools-agent.yaml"
+    _write_yaml(
+        file_path,
+        _full_agent_yaml()
+        + """
+
+  tools:
+    weather:
+      executor: server
+""",
+    )
+
+    with pytest.raises(ValueError, match="Agent config key 'tools' must be a list"):
+        load_settings(argv=["--agent-config", str(file_path)])