Calcule les droits de succession selon les héritiers et le patrimoine transmis.
AI agents call calculer_succession to retrieve information from Impots without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs tax calculation and analysis based on input parameters (heirs, patrimony). It retrieves or computes tax information without modifying any data, creating financial obligations, or executing arbitrary operations. It is purely informational and educational—a calculator that outputs tax estimates.
From the tool's definition Tool name is 'calculer_succession' (calculate inheritance taxes). Description states it 'Calcule les droits de succession selon les héritiers et le patrimoine transmis' (Calculates inheritance tax rights according to heirs and transmitted assets).
Documented attack patterns abuse exactly the kind of access calculer_succession gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Impots, and nothing reaches the server without passing your rules. This is the rule we recommend for calculer_succession:
{
"version": "1",
"default": "deny",
"tools": {
"calculer_succession": {}
}
}calculer_succession is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Calcule les droits de succession selon les héritiers et le patrimoine transmis. It is categorised as a Read tool in the Impots MCP Server, which means it retrieves data without modifying state.
Register the Impots MCP server in PolicyLayer and add a rule for calculer_succession: 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 Impots. Nothing to install.
calculer_succession 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 calculer_succession 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 calculer_succession. 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.
calculer_succession is provided by the Impots MCP server (w4zu/impots-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Impots, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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62 Impots tools catalogued and risk-classified — across an index of 43,000+ MCP servers.