mirror of
https://github.com/bilawalsidhu/gods-eye-view.git
synced 2026-11-04 10:24:02 +00:00
Sameh Khamis
85fee59da1
Add find_cctv_cameras, get_cctv_snapshot and find_radio_stations. A snapshot returns the camera's current frame as image content with its credit. Tool results may now carry base64 images, which the MCP adapter sends as image content.
101 lines
5.6 KiB
Markdown
101 lines
5.6 KiB
Markdown
# Tools and the MCP server
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Tools answer questions from God's Eye View data for language-model clients.
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They are defined once and exposed through adapters; the Model Context Protocol
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(MCP) is the first.
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## Layers
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| Owner | Responsibility |
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| -------------------- | ------------------------------------------------------------------------------------------------- |
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| `src/tools/` | Tool definitions, catalog composition, argument validation, shared `area` and result helpers |
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| `src/tools/queries/` | Queries, one file per domain, reading only portable source contracts |
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| `src/tools/mcp/` | MCP protocol (JSON-RPC) and a stateless HTTP transport; knows the catalog interface, not queries |
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| `server/mcp/` | Node composition: points the sources at a running app's `/api` routes and serves stdio |
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Dependencies point downward only. `gods-eye-view/tools` and
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`gods-eye-view/tools/mcp` are portable exports: they reach no application,
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rendering, Node, Cesium or browser-global code, which
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`npm run check:boundaries` enforces. Nothing in the application imports them.
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## Definitions and composition
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`defineTool({ name, kind, title, description, inputSchema, requires, run })`
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validates and freezes a tool. `kind` is `query` (answers from data, read-only)
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or `action`. `inputSchema` uses a JSON Schema subset that `src/tools/schema.js`
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checks completely; unsupported keywords are rejected at definition time.
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`run(args, { services, signal })` resolves to `{ summary, data }`: one sentence
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for people and a structured object for programs. A tool may also return `images`,
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each `{ mimeType, data }` with base64 data; the MCP adapter sends them as image
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content.
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`composeCatalog({ tools, services, replace, interceptors })` builds a catalog:
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- **Tools**: an application adds its own tools to `coreTools`. Reusing a name
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fails unless the name is listed in `replace`.
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- **Services**: each tool names the services it reads in `requires`. Tools
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whose services are not supplied are left out.
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- **Interceptors**: `(call, next) => next(call)` functions wrap every call,
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outermost first. They can observe, reject or change a call.
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Expected failures throw `ToolError` with one of `invalid_arguments`,
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`unavailable`, `unsupported`, `malformed` or `retry_later`. Other errors are
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reported to clients without details.
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## Services
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Services are the portable source factories the layers already use, such as
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`createUsgsEarthquakeSource`, `createFirmsSource` and `createLaunchSource`,
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plus a `places` service with `resolve(name, { signal })`. Sources request
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relative `/api/...` paths through an injected `fetchImpl`, so the same tool
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code runs wherever an application routes those paths.
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`createGeocodePlaceService` resolves place names through `/api/geocode`.
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## The `area` argument
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Location-scoped tools take `area` as exactly one of a `place` name, a `bbox`
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(`[west, south, east, north]`, crossing the antimeridian when west exceeds
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east), or `lat`, `lon` and `radius_km`. Lists default to 25 rows, at most 200,
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and report `total`, `returned` and `truncated`.
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## MCP
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`createMcpServer({ catalog, name, version, instructions, descriptions, decorate })`
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implements `initialize`, `ping`, `tools/list` and `tools/call` for protocol
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revisions 2025-11-25, 2025-06-18 and 2025-03-26. `descriptions` overrides a
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tool's title or description for this surface; `decorate(definition, tool)`
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merges extra fields into each listed definition. `createMcpHttpHandler(server)`
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returns a `Request`-to-`Response` handler for stateless Streamable HTTP: one
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JSON-RPC message per POST, answered with JSON. The host owns routing and any
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access control in front of it.
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## Running locally
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Start the app (`npm run dev` or `npm run preview`), then register the stdio
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server with an MCP client, for example Claude Code:
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```bash
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claude mcp add gods-eye-view -- npm --prefix /path/to/gods-eye-view run --silent mcp
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```
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`npm run mcp -- --api-base http://localhost:4173` selects another server. The
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local server makes no requests other than to the app's `/api` routes and the
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public feeds the sources already use.
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## Tools
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| Tool | Reads | Returns |
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| --------------------- | ------------- | ------------------------------------------------------------- |
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| `get_earthquakes` | `earthquakes` | USGS M2.5+ events in the last 24 hours, strongest first |
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| `get_active_fires` | `fires` | NASA FIRMS detections in an area, highest radiative power first |
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| `get_recent_launches` | `launches` | Launch Library 2 launches in the last 30 days, newest first |
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| `aircraft_in_area` | `aircraft` | Aircraft in an area, nearest first; `military: true` reads the `military` feed |
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| `find_aircraft` | `aircraft` | Aircraft anywhere by callsign, ICAO address or registration |
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| `get_aircraft_track` | `aircraft` | Recent positions of one aircraft, thinned to 200 points |
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| `get_aircraft_info` | `aircraft` | Aircraft type and registration, and flight route, from adsbdb |
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| `next_satellite_pass` | `satellites` | Next pass over a point (default the ISS), with naked-eye visibility |
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| `satellites_overhead` | `satellites` | Satellites in a CelesTrak group above a point now, highest first |
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| `find_cctv_cameras` | `cctv` | Public cameras in an area, nearest first |
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| `get_cctv_snapshot` | `cctv` | The current image from one camera, returned as image content |
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| `find_radio_stations` | `radio` | Radio Browser stations by area and/or search terms, with stream URLs |
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