Simula juros compostos com aportes mensais. Fórmula: VF = PV×(1+i)^n + PMT×[((1+i)^n−1)/i]. Útil para planejamento de investimento (Tesouro, CDB, previdência), FIRE, aposentadoria. Retorna valor futuro, total aportado, juros acumulados e série mensal (saldo mês a mês). Não desconta IR (para renda...
AI agents call calcular_juros_compostos 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 |
|---|---|---|---|
prazoMeses | integer | Yes | Prazo em meses (1 a 1200, equivalente a 100 anos) |
aporteAnualExtra | integer | — | Aporte extra anual em centavos (some 13º + PLR + bônus). Aplicado a cada 12 meses. Default 0. |
aporteMensalCents | integer | Yes | Aporte mensal em centavos (R$ 500 = 50000); 0 se não houver |
taxaMensalPercent | number | Yes | Taxa de juros mensal em % (1 = 1% ao mês) |
capitalInicialCents | integer | Yes | Capital inicial em centavos (R$ 10.000 = 1000000) |
crescimentoAporteMensalPercent | number | — | Crescimento % anual do aporte mensal (emparelha com inflação salarial). Default 0. |
Parameters from the server's own tool schema.
This is a financial calculator that simulates investment scenarios and returns computational results. It does not execute trades, process payments, move money, modify records, or trigger external operations. It is purely informational—retrieving calculated projections based on input parameters. This fits the Read category (retrieves/queries data with no side effects).
From the tool's definition Tool description explicitly states it 'Simula juros compostos' (simulates compound interest) and 'Retorna valor futuro' (returns future value), 'total aportado' (total contributed), 'juros acumulados' (accumulated interest) and 'série mensal' (monthly series).
Attacks that exploit this kind of access
Simula juros compostos com aportes mensais. Fórmula: VF = PV×(1+i)^n + PMT×[((1+i)^n−1)/i]. Útil para planejamento de investimento (Tesouro, CDB, previdência), FIRE, aposentadoria. Retorna valor futuro, total aportado, juros acumulados e série mensal (saldo mês a mês). Não desconta IR (para renda fixa, aplicar 15% sobre juros). It is categorised as a Read tool in the Contaí — Calculadoras Fiscais Brasileiras MCP Server, which means it retrieves data without modifying state.
calcular_juros_compostos accepts 6 parameters: prazoMeses, aporteAnualExtra, aporteMensalCents, taxaMensalPercent, capitalInicialCents, crescimentoAporteMensalPercent. Required: prazoMeses, aporteMensalCents, taxaMensalPercent, capitalInicialCents. 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_juros_compostos: 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_juros_compostos 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_juros_compostos 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_juros_compostos. 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_juros_compostos 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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