指定した矩形範囲内の緑地・公園データをGeoJSON形式で取得します。公園、森林、農地、庭園などの緑地情報が含まれます。
AI agents call get_green_spaces to retrieve information from OSM-GeoJSON-MCP-Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves geographical data about green spaces within a specified rectangular area. It performs a query operation that has no side effects—it does not create, modify, delete, execute code, or trigger external actions. The operation is purely informational and returns data in GeoJSON format for analysis and visualization purposes. No reversible or irreversible changes to data occur.
From the tool's definition Tool name 'get_green_spaces' and description indicate querying/retrieving green space data (parks, forests, agricultural areas, gardens) from OpenStreetMap via Overpass API and converting to GeoJSON format.
Documented attack patterns abuse exactly the kind of access get_green_spaces 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 get_green_spaces:
{
"version": "1",
"default": "deny",
"tools": {
"get_green_spaces": {}
}
}get_green_spaces is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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指定した矩形範囲内の緑地・公園データをGeoJSON形式で取得します。公園、森林、農地、庭園などの緑地情報が含まれます。. It is categorised as a Read tool in the OSM-GeoJSON-MCP-Server MCP Server, which means it retrieves data without modifying state.
Register the OSM-GeoJSON-MCP-Server MCP server in PolicyLayer and add a rule for get_green_spaces: 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.
get_green_spaces is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_green_spaces 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 get_green_spaces. 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.
get_green_spaces 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.