Compare l'adresse d'un centre de santé côté CNAM (Annuaire santé Ameli) vs FINESS DREES pour un même num_finess. Primitive brute SANS interprétation métier — retourne les deux adresses, un score_dice (0..1, informatif ; null si non comparable car finess_absent) et un statut. Le caller décide quoi...
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AI agents call compare_adresse_cnam_vs_finess to retrieve information from France Data Mcp without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though compare_adresse_cnam_vs_finess only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"compare_adresse_cnam_vs_finess": {}
}
}See the full France Data Mcp policy for all 36 tools.
These attack patterns abuse exactly the kind of access compare_adresse_cnam_vs_finess gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Compare l'adresse d'un centre de santé côté CNAM (Annuaire santé Ameli) vs FINESS DREES pour un même num_finess. Primitive brute SANS interprétation métier — retourne les deux adresses, un score_dice (0..1, informatif ; null si non comparable car finess_absent) et un statut. Le caller décide quoi faire de la divergence. Utilité : signaler un déménagement propagé par une source mais pas (encore) par l'autre (ex: CNAM '5 RUE DE L'ARQUEBUSE AUTUN' vs FINESS '15 BD BERNARD GIBERSTEIN AUTUN' pour le même FINESS). Équivalent côté centre de santé de compare_raison_sociale_finess_vs_rpps. Statut (présent uniquement sur found: true) : - match : adresses strictement égales après normalisation - match_after_abbreviation_normalization : égales après expansion des abréviations de voie FR (R/RUE, BD/BOULEVARD, AV/AVENUE…) — MÊME adresse, simple abréviation DREES vs CNAM, PAS un déménagement - divergent_after_normalization : adresses réellement différentes (déménagement non synchronisé entre sources) - finess_absent : le CDS existe côté CNAM mais le num_finess est absent de FINESS DREES (latence sync bimensuelle) Format : objet LookupResult discriminé par found. Si le num_finess n'est PAS un centre de santé CNAM, le tool retourne {found: false, lookupStatus: 'not_found', message} (utiliser etablissement_by_finess pour un établissement non-CDS).. It is categorised as a Read tool in the France Data Mcp MCP Server, which means it retrieves data without modifying state.
Register the France Data MCP server in PolicyLayer and add a rule for compare_adresse_cnam_vs_finess: 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 France Data Mcp. Nothing to install.
compare_adresse_cnam_vs_finess 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 compare_adresse_cnam_vs_finess 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 compare_adresse_cnam_vs_finess. 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.
compare_adresse_cnam_vs_finess is provided by the France Data MCP server (france-data-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 36 France Data Mcp tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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