feat: add get_activities and get_activity_details tools

server.py

@@ -100,6 +100,36 @@ def complete_mfa(code: str) -> str:
         return "Timed out waiting for authentication to complete."
 
 
+@mcp.tool()
+def get_activities(start_date: str = "", end_date: str = "", limit: int = 20) -> str:
+    """List Garmin activities between two dates (YYYY-MM-DD). Defaults to today."""
+    if err := _check_auth():
+        return err
+    start = start_date or _today()
+    end = end_date or _today()
+    try:
+        result = _client.get_activities_by_date(start, end)
+        return json.dumps(result[:limit], indent=2)
+    except GarminConnectAuthenticationError:
+        return "Authentication error. Call authenticate() again."
+    except Exception as exc:
+        return f"Error fetching activities: {exc}"
+
+
+@mcp.tool()
+def get_activity_details(activity_id: str) -> str:
+    """Get full details for a single activity by its ID (splits, laps, metrics)."""
+    if err := _check_auth():
+        return err
+    try:
+        result = _client.get_activity_details(activity_id)
+        return json.dumps(result, indent=2)
+    except GarminConnectAuthenticationError:
+        return "Authentication error. Call authenticate() again."
+    except Exception as exc:
+        return f"Error fetching activity details: {exc}"
+
+
 if __name__ == "__main__":
     _startup_login()
     mcp.run()

tests/test_server.py

@@ -2,9 +2,11 @@ import json
 import os
 import queue
 import threading
+from datetime import date
 from unittest.mock import MagicMock, patch
 
 import pytest
+from garminconnect import GarminConnectAuthenticationError
 
 import server
 
@@ -84,3 +86,62 @@ def test_authenticate_missing_credentials():
         os.environ.pop("GARMIN_PASSWORD", None)
         result = server.authenticate()
     assert result == "GARMIN_EMAIL and GARMIN_PASSWORD environment variables are required."
+
+
+def test_get_activities_unauthenticated():
+    server._auth_state = "unauthenticated"
+    assert "Not authenticated" in server.get_activities()
+
+
+def test_get_activities_success():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.get_activities_by_date.return_value = [
+        {"activityId": "111", "activityType": {"typeKey": "running"}, "distance": 5000.0},
+        {"activityId": "222", "activityType": {"typeKey": "cycling"}, "distance": 20000.0},
+    ]
+    result = server.get_activities("2026-05-01", "2026-05-17", 20)
+    data = json.loads(result)
+    assert len(data) == 2
+    assert data[0]["activityId"] == "111"
+    server._client.get_activities_by_date.assert_called_once_with("2026-05-01", "2026-05-17")
+
+
+def test_get_activities_limit():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.get_activities_by_date.return_value = [{"activityId": str(i)} for i in range(10)]
+    data = json.loads(server.get_activities("2026-05-01", "2026-05-17", 3))
+    assert len(data) == 3
+
+
+def test_get_activities_defaults_to_today():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.get_activities_by_date.return_value = []
+    server.get_activities()
+    today = date.today().isoformat()
+    server._client.get_activities_by_date.assert_called_once_with(today, today)
+
+
+def test_get_activities_auth_error():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.get_activities_by_date.side_effect = GarminConnectAuthenticationError("auth")
+    assert "Authentication error" in server.get_activities()
+
+
+def test_get_activity_details_success():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.get_activity_details.return_value = {"activityId": "111", "laps": []}
+    data = json.loads(server.get_activity_details("111"))
+    assert data["activityId"] == "111"
+    server._client.get_activity_details.assert_called_once_with("111")
+
+
+def test_get_activity_details_error():
+    server._auth_state = "authenticated"
+    server._client = MagicMock()
+    server._client.get_activity_details.side_effect = Exception("not found")
+    assert "Error fetching activity details" in server.get_activity_details("999")