Lister toutes les couches WMS disponibles (cartes à la demande)
AI agents call list_wms_layers to retrieve information from French Open Data & IGN without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about Web Map Service (WMS) layers—it lists what mapping layers are available from IGN's cartographic services. It performs read-only discovery/enumeration with no side effects, data modification, code execution, or financial impact. The blast radius of misuse is minimal; an attacker could only learn what map layers exist, not access their data, execute commands, or cause harm.
From the tool's definition Tool name 'list_wms_layers' and description 'Lister toutes les couches WMS disponibles (cartes à la demande)' [List all available WMS layers (on-demand maps)] indicate querying/enumerating available cartographic resources without modification or execution of…
Documented attack patterns abuse exactly the kind of access list_wms_layers gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and French Open Data & IGN, and nothing reaches the server without passing your rules. This is the rule we recommend for list_wms_layers:
{
"version": "1",
"default": "deny",
"tools": {
"list_wms_layers": {}
}
}list_wms_layers is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
Lister toutes les couches WMS disponibles (cartes à la demande). It is categorised as a Read tool in the French Open Data & IGN MCP Server, which means it retrieves data without modifying state.
Register the French Open Data & IGN MCP server in PolicyLayer and add a rule for list_wms_layers: 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 French Open Data & IGN. Nothing to install.
list_wms_layers 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 list_wms_layers 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 list_wms_layers. 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.
list_wms_layers is provided by the French Open Data & IGN MCP server (nikoko107/mcp-datagouv-ign). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from French Open Data & IGN, 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.
26 French Open Data & IGN tools catalogued and risk-classified — across an index of 43,000+ MCP servers.