InfraNode

- get_city: Get base data for a German city (population, area, coordinates).

Sourced from Wikidata. Read-only. Useful as a first lookup to confirm a city
exists and get its core attributes. For a broader question about the city
(what data is available at all) use `get_city_overview instead.
- get_city_overview: Get a ONE-CALL overview of everything InfraNode knows about a German city.

Start here for any city question. Returns: the city's base data, a CATALOG of
all 81 available data types (weather, air quality, public transit, trains,
traffic, charging, parking, solar, energy, demographics, taxes, accidents,
tourism, heritage, trees, population density, playgrounds, post boxes and many
more), each with its coverage status and the exact tool to call next (for most
data types that is get_city_resource(slug, resource=<type>)), plus a small
live highlights snapshot (current weather, air quality and train departures).
Data types not yet covered for this city show where they ARE available so you
can pivot. InfraNode keeps adding data and cities, so the catalog grows over
time. Read-only.
- get_city_resource: Fetch ANY per-city data type by its key (generic accessor, 81 data types).

One tool for the whole breadth of InfraNode: live data (air, traffic, transit
stops, parking, charging, water-level, flood, sharing, fuel-prices,
webcams, station-departures/-arrivals/stations, ...), statistics
(demographics, unemployment, tourism, accidents, crime-stats, indicators,
land-values, tax-rates, insolvencies, ...), multi-year TIME SERIES
(sustainability: SDG indicators per municipality, one value per year from
2006 to 2023, so trends can be answered without stitching snapshots),
infrastructure and environment
(solar, solar-roofs, district-heating, energy, heritage, tree-cadastre,
playgrounds, public-toilets, markets, education, ...) and more. Discover the
valid keys and per-city coverage with get_city_overview(slug) or the
infranode://catalog resource; the resource enum lists every key.
Uncovered types return source_status="not_covered" (plus where they ARE
available), never an error. Read-only.
- air_quality: Get official air quality for a German city (PM10, NO2 and more).

Sourced from the Umweltbundesamt (UBA). Read-only. For live nearest-station
hourly readings use get_city_resource(slug, resource='air') instead.
- weather: Get current weather observations for a German city.

Sourced from the Deutscher Wetterdienst (DWD): temperature, wind,
precipitation and related fields. Read-only, current conditions only (not a
forecast). For warnings use get_city_resource(slug,
resource='weather-warnings'). For a broader question about the city (not
just weather) use get_city_overview instead, which already includes a
live weather highlight.
- pois: Get points of interest in a German city, filtered by type.

Sourced from OpenStreetMap. Read-only.
- station_board_departures: Get live departures for ANY railway station by its EVA number.

Covers all train categories including local/regional (S/RB/RE) and long
distance, with real-time delays, cancellations and disruption messages. Get
the EVA from get_city_resource(slug, resource='stations'). Read-only.
- station_board_arrivals: Get live arrivals for ANY railway station by its EVA number.

Mirror of station_board_departures for arriving trains (all categories,
real-time delays, disruption messages). Get the EVA from
get_city_resource(slug, resource='stations'). Read-only.
- transit_departures: Get live public-transport departures with real-time delays for a stop.

Sourced from GTFS-RT/HVV/VGN. Unlike the static stop list
(get_city_resource(slug, resource='transit')), this returns minute-fresh
departures including delay for ONE stop. A stop_id is required: fetch the
city's transit stops first to discover valid stop IDs, then pass one here.
Read-only.
- list_cities: List all covered cities (slug, federal state, population, coverage).

Takes no arguments. Call this first to discover valid city slugs before
invoking any city-scoped tool. Read-only.
- sources: List all data sources with license, attribution and availability.

Takes no arguments. Shows which upstream sources InfraNode bundles and
whether each is currently active. Read-only.
- compare: Compare ONE resource across MULTIPLE cities in a single response.

Fans the resource out over the listed cities and returns a per-city
source_status` (ok/disabled/no_data/error/not_found), so a missing or
failing city source does not spoil the whole answer. Read-only.