Rechercher des communes par nom ou code postal
AI agents call search_communes 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 or queries data about French communes based on name or postal code parameters. It performs a lookup operation with no side effects, data modification, code execution, or financial implications. The description explicitly indicates a search function, placing it firmly in the Read category.
From the tool's definition Tool name 'search_communes' and description 'Rechercher des communes par nom ou code postal' (Search for communes by name or postal code) indicate a search/query operation that retrieves municipal administrative data without modifying or executing operations.
Documented attack patterns abuse exactly the kind of access search_communes 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 search_communes:
{
"version": "1",
"default": "deny",
"tools": {
"search_communes": {}
}
}search_communes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Rechercher des communes par nom ou code postal. 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 search_communes: 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.
search_communes 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 search_communes 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 search_communes. 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.
search_communes 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.