Load and cache OSM walk+transit graph for a place name or bounding box.

Prefer a place query (e.g. "Le Marais, Paris") or an explicit bbox. Must be called before plan_route, describe_area, or snap_to_network.

Resolve a place name or address to latitude/longitude and metadata.

Resolve coordinates to a human-readable place.

Plan a multimodal route on the loaded area graph.

modes defaults to walk+transit. Use ["walk"] for pedestrian-only. Requires a prior successful load_area call.

Find nearby points of interest (cafes, pharmacies, parks, etc.).

List nearby transit stops and the lines that serve them.

Describe the loaded area's structure: axes, neighborhoods, landmarks.

Useful for giving LLMs city-design context before narrating directions.

Snap a coordinate to the nearest loaded graph node (intersection or stop).