OpenStreetMapデータをダウンロードしてファイルに保存します。大きなデータも扱えます。
AI agents use download_osm_data to create or update resources in OSM-GeoJSON-MCP-Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your OSM-GeoJSON-MCP-Server environment.
The tool downloads OpenStreetMap data and saves it to a file on the local filesystem. This is a Write operation as it creates/writes files. The description is partially uninformative (no details on file paths, overwrite behavior, or size limits beyond 'can handle large data'), which slightly lowers confidence.
From the tool's definition "ダウンロードしてファイルに保存します" (downloads and saves to file)
Documented attack patterns abuse exactly the kind of access download_osm_data gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and OSM-GeoJSON-MCP-Server, and nothing reaches the server without passing your rules. This is the rule we recommend for download_osm_data:
{
"version": "1",
"default": "deny",
"tools": {
"download_osm_data": {
"limits": [
{
"counter": "download_osm_data_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}download_osm_data stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
Free to start. No card required.
OpenStreetMapデータをダウンロードしてファイルに保存します。大きなデータも扱えます。. It is categorised as a Write tool in the OSM-GeoJSON-MCP-Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the OSM-GeoJSON-MCP-Server MCP server in PolicyLayer and add a rule for download_osm_data: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches OSM-GeoJSON-MCP-Server. Nothing to install.
download_osm_data is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the download_osm_data rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for download_osm_data. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
download_osm_data is provided by the OSM-GeoJSON-MCP-Server MCP server (shimizu/osm-geojson-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from OSM-GeoJSON-MCP-Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
11 OSM-GeoJSON-MCP-Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.