Compare les deux régimes fiscaux d
AI agents call simuler_sci 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.
The tool simulates and compares tax outcomes for different legal structures (SCI—Société Civile Immobilière). This is a calculation and comparison function that retrieves or derives information based on inputs, with no side effects such as creating, modifying, deleting data, executing code, or initiating financial transactions.
From the tool's definition Tool name 'simuler_sci' (simulate) and description fragment 'Compare les deux régimes fiscaux' (compare two tax regimes) indicate the tool performs tax scenario analysis and comparison—a read-only informational operation with no data modification or execution…
Documented attack patterns abuse exactly the kind of access simuler_sci 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 simuler_sci:
{
"version": "1",
"default": "deny",
"tools": {
"simuler_sci": {}
}
}simuler_sci is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Compare les deux régimes fiscaux d. 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 simuler_sci: 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.
simuler_sci 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 simuler_sci 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 simuler_sci. 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.
simuler_sci 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.