Compara o custo total de constituir e manter uma holding familiar versus passar pelo inventário tradicional. Considera ITCMD por UF, custos de constituição/manutenção, economia tributária em aluguéis e horizonte de tempo. Retorna: diferencaTotalCents, compensaHolding, cenarioInventarioCustoCents,...
AI agents call calcular_holding_familiar to retrieve information from Contaí — Calculadoras Fiscais Brasileiras without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
uf | string | Yes | Sigla do estado (UF) onde os principais bens estão localizados |
horizonteAnos | integer | — | Horizonte de avaliação em anos (5 a 50). Default 20. |
numeroImoveis | integer | — | Número de imóveis a serem inseridos na holding |
temConjugeMeacao | boolean | — | true se há cônjuge com meação (50% do patrimônio é do cônjuge). Reduz base ITCMD. |
patrimonioTotalCents | integer | Yes | Patrimônio total a ser estruturado em centavos. Ex: R$ 2.000.000 = 200000000 |
custoManutencaoAnualCents | integer | — | Custo de manutenção anual da holding (contabilidade, obrigações) em centavos. Default R$ 15.000 |
recebeAlugueisMensaisCents | integer | — | Aluguéis mensais recebidos como PF em centavos (antes da holding) |
custoConstituicaoEstimadoCents | integer | — | Custo estimado de constituição da holding em centavos. Default R$ 35.000 = 3500000 |
Parameters from the server's own tool schema.
This tool performs financial calculations and scenario comparisons (holding familiar vs. traditional inheritance/inventário) but does not create, modify, delete, or execute any actual financial transactions or external operations. It is purely analytical—taking input parameters (ITCMD by state, costs, time horizon) and returning computed numeric comparisons.
From the tool's definition Tool name and description indicate it 'Compares the total cost' (comparação) and 'Returns' (Retorna) calculated values. The verbs are 'compares' and 'returns' — data retrieval and computation operations.
Attacks that exploit this kind of access
Compara o custo total de constituir e manter uma holding familiar versus passar pelo inventário tradicional. Considera ITCMD por UF, custos de constituição/manutenção, economia tributária em aluguéis e horizonte de tempo. Retorna: diferencaTotalCents, compensaHolding, cenarioInventarioCustoCents, cenarioHoldingCustoCents, economiaTributariaAlugueisAnualCents, itcmdInventarioCents. It is categorised as a Read tool in the Contaí — Calculadoras Fiscais Brasileiras MCP Server, which means it retrieves data without modifying state.
calcular_holding_familiar accepts 8 parameters: uf, horizonteAnos, numeroImoveis, temConjugeMeacao, patrimonioTotalCents, custoManutencaoAnualCents, recebeAlugueisMensaisCents, custoConstituicaoEstimadoCents. Required: uf, patrimonioTotalCents. The full parameter table on this page comes from the server's own tool schema.
Register the Contaí — Calculadoras Fiscais Brasileiras MCP server in PolicyLayer and add a rule for calcular_holding_familiar: 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 Contaí — Calculadoras Fiscais Brasileiras. Nothing to install.
calcular_holding_familiar 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 calcular_holding_familiar 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 calcular_holding_familiar. 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.
calcular_holding_familiar is provided by the Contaí — Calculadoras Fiscais Brasileiras MCP server (@contai-evoluke/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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