AI agents call download_street_network to retrieve information from GIS MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Downloading street network data is a read operation—it retrieves external geospatial datasets. However, severity is elevated to 'medium' rather than 'low' because downloaded data could be cached locally or influence subsequent operations, and the empty description reduces confidence. The tool does not modify, delete, execute arbitrary code, or commit financial transactions.
From the tool's definition Tool name 'download_street_network' indicates retrieval of geospatial data (street network). No description provided, but context from sibling tools (buffer, clip_raster, calculate_geodetic_distance) confirms this is a geospatial analysis server.
Documented attack patterns abuse exactly the kind of access download_street_network gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and GIS MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for download_street_network:
{
"version": "1",
"default": "deny",
"tools": {
"download_street_network": {}
}
}download_street_network is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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download_street_network. It is categorised as a Read tool in the GIS MCP Server MCP Server, which means it retrieves data without modifying state.
Register the GIS MCP Server MCP server in PolicyLayer and add a rule for download_street_network: 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 GIS MCP Server. Nothing to install.
download_street_network 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 download_street_network 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_street_network. 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_street_network is provided by the GIS MCP Server MCP server (mahdin75/gis-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from GIS MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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98 GIS MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.