Complete property purchase simulator. Calculates total acquisition costs (down payment, FGTS, ITBI, notary fees) plus financing costs (installment, total paid, interest) with automatic comparison between SAC, Price, and Consortium modalities. Use to plan a complete property purchase budget.
AI agents call calcular_planejamento_compra_imovel 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 |
|---|---|---|---|
fgtsCents | integer | — | FGTS balance to use as down payment, in cents. 0 if not using. |
modalidade | string | Yes | Modality: sac = decreasing installments, price = fixed installments, consorcio = consortium (no interest, admin fee only) |
prazoMeses | integer | Yes | Loan term in months. Ex: 360 = 30 years |
percentualItbi | number | — | ITBI tax rate (%). Varies by municipality, typically 2-4%. Ex: 3 = 3% |
valorImovelCents | integer | Yes | Property value in cents (R$ 500,000 = 50000000) |
percentualEntrada | number | Yes | Down payment percentage (%). Ex: 20 = 20% |
taxaJurosAnualBps | integer | Yes | Annual interest rate in basis points. Ex: 1050 = 10.5% per year |
percentualCartorio | number | — | Estimated notary and registration costs (% of property value). Ex: 1.5 = 1.5% |
taxaAdminConsorcio | number | — | Total consortium administration fee over the term (%). Ex: 18 = 18% |
Parameters from the server's own tool schema.
This is a calculator/simulator tool that performs arithmetic on user-provided inputs to generate comparative financial projections. It reads data (property parameters, financing options) and outputs analytical results without creating, modifying, deleting records, executing code, moving money, or triggering irreversible actions.
From the tool's definition Tool description states it 'Calculates total acquisition costs' and 'financing costs' with 'automatic comparison between SAC, Price, and Consortium modalities.' Verbs are 'Calculates' and 'Use to plan' — purely computational analysis with no data…
Attacks that exploit this kind of access
Complete property purchase simulator. Calculates total acquisition costs (down payment, FGTS, ITBI, notary fees) plus financing costs (installment, total paid, interest) with automatic comparison between SAC, Price, and Consortium modalities. Use to plan a complete property purchase budget. It is categorised as a Read tool in the Contaí — Calculadoras Fiscais Brasileiras MCP Server, which means it retrieves data without modifying state.
calcular_planejamento_compra_imovel accepts 9 parameters: fgtsCents, modalidade, prazoMeses, percentualItbi, valorImovelCents, percentualEntrada, taxaJurosAnualBps, percentualCartorio, taxaAdminConsorcio. Required: modalidade, prazoMeses, valorImovelCents, percentualEntrada, taxaJurosAnualBps. 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_planejamento_compra_imovel: 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_planejamento_compra_imovel 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_planejamento_compra_imovel 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_planejamento_compra_imovel. 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_planejamento_compra_imovel 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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