google-maps

name	google-maps
description	Start navigation, get directions and route info via Google Maps app. Tools: intent, http (optional, requires Maps API key for traffic/route details).

Google Maps Navigation

Start navigation, look up addresses, calculate distances, and query route/traffic information.

Tool: intent

Use the intent tool to open Google Maps.

Start navigation

{
  "action": "android.intent.action.VIEW",
  "uri": "google.navigation:q={DESTINATION}",
  "package": "com.google.android.apps.maps"
}

Examples for the URI field:

• google.navigation:q=Grand+Central+Station → navigates to Grand Central Station
• google.navigation:q=51.5074,-0.1278 → navigates to GPS coordinates
• google.navigation:q=Paris&mode=d → navigates to Paris (driving mode)
• google.navigation:q=New+York&mode=w → navigates to New York (walking mode)
• google.navigation:q=Los+Angeles&mode=b → navigates to Los Angeles (cycling mode)

Show location (without navigation)

{
  "action": "android.intent.action.VIEW",
  "uri": "geo:0,0?q={SEARCH_TERM}",
  "package": "com.google.android.apps.maps"
}

Stop navigation

To stop an active navigation session, use the accessibility tool to find and tap the "Stop" or "Exit" button inside the running Google Maps app:

1. Bring Google Maps to the foreground (intent with android.intent.action.MAIN).
2. Call get_accessibility_tree on com.google.android.apps.maps to locate the stop/exit button node.
3. Call accessibility_action with action "click" on that node.

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Tool: http – Route & Traffic Information (requires API key)

Before calling the Routes API, always check whether the API key is configured:

check_credential("google_maps_api_key")

If configured: false → inform the user that they need to add the Google Maps API key under Settings → Services and skip the API call.

If configured: true → proceed. Use auth_provider: "google_maps_api_key" and auth_header: "X-Goog-Api-Key" in the http call. The tool injects the key into that header automatically.

Get route + travel time + traffic information (Google Maps Routes API)

⚠️ X-Goog-FieldMask is a REQUIRED header – always include it. The API returns 400 without it.

The Routes API accepts plain address strings directly in origin and destination – no separate geocoding step needed. Use "address" for named places, "latLng" only when you already have GPS coordinates.

{
  "method": "POST",
  "url": "https://routes.googleapis.com/directions/v2:computeRoutes",
  "auth_provider": "google_maps_api_key",
  "auth_header": "X-Goog-Api-Key",
  "headers": [
    { "key": "X-Goog-FieldMask", "value": "routes.duration,routes.distanceMeters,routes.staticDuration,routes.legs.travelAdvisory.speedReadingIntervals" }
  ],
  "body": {
    "origin": {
      "address": "Current location or street address"
    },
    "destination": {
      "address": "City or street address"
    },
    "travelMode": "DRIVE",
    "routingPreference": "TRAFFIC_AWARE"
  }
}

For the origin, prefer "latLng" with coordinates from device get_location for accuracy. For the destination, always use "address" with the place name – no geocoding API needed.

Response fields:

• duration (seconds string, e.g. "3600s") – travel time with live traffic → convert to h/min
• staticDuration – travel time without traffic → compare to duration for delay
• distanceMeters → convert to km
• legs[].travelAdvisory.speedReadingIntervals[].speed: NORMAL / SLOW / TRAFFIC_JAM

How to present the result – always natural language, no raw data:

• Convert seconds to "X h Y min" (or "X hours Y minutes" in English)
• Convert meters to km (round to nearest km)
• Never show GPS coordinates, field names, raw seconds, or JSON to the user
• If duration < staticDuration: traffic is lighter than usual → mention it
• If duration > staticDuration by more than 5 min: there is a delay → state how many minutes
• If TRAFFIC_JAM segments exist: mention congestion on the route
• Good: "To Paris it's about 350 km, travel time approximately 3 h 45 min – currently no traffic."
• Bad: "duration: 13500s, staticDuration: 14000s, coordinates: 48.8566, 2.3522"

Full workflow – "Is there traffic on the way to London?":

1. check_credential("google_maps_api_key") – if not configured, tell the user and stop
2. device get_location to get current GPS coordinates (use as origin.latLng)
3. http POST Routes API with destination as "address": "London" → extract duration, staticDuration, distanceMeters, speedReadingIntervals
4. Count TRAFFIC_JAM segments; compare duration vs staticDuration to estimate delay
5. Respond in plain natural language – distance in km, time in h/min, traffic in words

Calculate distance between two locations

IMPORTANT: Choose the right method based on your needs:

1. Straight-line distance (as the crow flies) between two GPS coordinates → Use Haversine formula (no API key needed, see below)
2. Driving/walking distance (route distance) → Use Routes API (requires API key, see below)

Straight-line distance between two GPS coordinates (Haversine formula)

For calculating the straight-line distance between two GPS coordinates (e.g., checking if you're within X km of a location), use the device tool with action calculate_distance. This requires no API key.

Using the device tool:

{
  "action": "calculate_distance",
  "latitude1": 48.1234,
  "longitude1": 16.5678,
  "latitude2": 48.0600,
  "longitude2": 16.0840
}

Returns distance in kilometers (e.g., "Distance: 5.23 km (5230 m)").

Workflow for "check if within X km of location":

1. Get current location: device get_location → returns coordinates (e.g., 48.1234, 16.5678)
2. Calculate distance: device calculate_distance with:
   • latitude1, longitude1: current location from step 1
   • latitude2, longitude2: target location coordinates
3. Extract distance from result (in km) and compare to threshold (e.g., if (distance < 5) { /* within 5 km */ })

Route distance (driving/walking distance) via Routes API

To calculate the driving, walking, or cycling distance between two locations (addresses or coordinates), use the Routes API with the distanceMeters field in the field mask. This requires a Google Maps API key.

Distance between two addresses:

{
  "method": "POST",
  "url": "https://routes.googleapis.com/directions/v2:computeRoutes",
  "auth_provider": "google_maps_api_key",
  "auth_header": "X-Goog-Api-Key",
  "headers": [
    { "key": "X-Goog-FieldMask", "value": "routes.distanceMeters" }
  ],
  "body": {
    "origin": {
      "address": "Berlin, Germany"
    },
    "destination": {
      "address": "Munich, Germany"
    },
    "travelMode": "DRIVE"
  }
}

Distance from current location to an address:

1. Get current location: device get_location → returns { latitude, longitude }
2. Use Routes API with origin.latLng:

{
  "method": "POST",
  "url": "https://routes.googleapis.com/directions/v2:computeRoutes",
  "auth_provider": "google_maps_api_key",
  "auth_header": "X-Goog-Api-Key",
  "headers": [
    { "key": "X-Goog-FieldMask", "value": "routes.distanceMeters" }
  ],
  "body": {
    "origin": {
      "latLng": {
        "latitude": 52.5200,
        "longitude": 13.4050
      }
    },
    "destination": {
      "address": "Paris, France"
    },
    "travelMode": "DRIVE"
  }
}

Distance between two coordinates:

{
  "method": "POST",
  "url": "https://routes.googleapis.com/directions/v2:computeRoutes",
  "auth_provider": "google_maps_api_key",
  "auth_header": "X-Goog-Api-Key",
  "headers": [
    { "key": "X-Goog-FieldMask", "value": "routes.distanceMeters" }
  ],
  "body": {
    "origin": {
      "latLng": {
        "latitude": 52.5200,
        "longitude": 13.4050
      }
    },
    "destination": {
      "latLng": {
        "latitude": 48.8566,
        "longitude": 2.3522
      }
    },
    "travelMode": "DRIVE"
  }
}

Response handling:

• Extract routes[0].distanceMeters from the response
• Convert meters to kilometers: distanceKm = distanceMeters / 1000
• Round to 1 decimal place for display
• Present in natural language: "The distance is approximately 350 km" or "It's about 2.5 km away"

Travel modes for distance calculation:

• DRIVE – driving distance (default, most common)
• WALK – walking distance
• BICYCLE – cycling distance
• TRANSIT – public transit distance

Full workflow – "How far is Paris from here?" (route distance):

1. check_credential("google_maps_api_key") – if not configured, tell the user and stop
2. device get_location to get current GPS coordinates
3. http POST Routes API with origin.latLng (current location) and destination.address ("Paris")
4. Extract routes[0].distanceMeters from response
5. Convert to km and respond: "Paris is approximately 350 km away from your current location"

Full workflow – "Am I within 5 km of a location?" (straight-line distance):

1. device get_location to get current GPS coordinates (e.g., lat1 = 48.1234, lon1 = 16.5678)
2. device calculate_distance with current location and target coordinates (e.g., lat2 = 48.0600, lon2 = 16.0840)
3. Extract distance from result (in km) and compare: if (distance < 5) { /* within 5 km */ }
4. No API key needed for this calculation

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Examples

• "Navigate to the train station" → google.navigation:q=Grand+Central+Station
• "Drive to Paris" → google.navigation:q=Paris
• "Show me where the park is" → geo:0,0?q=Central+Park+New+York
• "Navigate home" → google.navigation:q=home
• "Stop navigation" → accessibility tool to tap stop button
• "How long to London?" → check_credential → get_location → Routes API (destination as address string) → tts
• "Is there a traffic jam on the way to Paris?" → check_credential → get_location → Routes API → check speedReadingIntervals → tts
• "Gas station nearby" → geo:0,0?q=gas+station
• "How far is Berlin from Munich?" (route distance) → check_credential → Routes API (origin: "Berlin", destination: "Munich") → extract distanceMeters → convert to km → tts
• "What's the distance to Paris?" (route distance) → check_credential → get_location → Routes API (origin: current location, destination: "Paris") → extract distanceMeters → convert to km → tts
• "Calculate distance between these two addresses" (route distance) → check_credential → Routes API with both addresses → extract distanceMeters → tts
• "Am I within 5 km of a location?" (straight-line distance) → get_location → calculate_distance with target coordinates → compare to 5 km → tts
• "Check if I'm near location X" (straight-line distance) → get_location → calculate_distance → compare to threshold → tts

Notes

• Replace spaces in destination with +
• For addresses use: "Street+Number+City"
• Umlauts can be used directly or URL-encoded: ä=%C3%A4, ö=%C3%B6, ü=%C3%BC
• Routes API requires the Google Maps API key in Settings → Services