Calcula VPL (Valor Presente Líquido) e TIR (Taxa Interna de Retorno) de um projeto de investimento. VPL = Σ [FC_t / (1+r)^t] — se VPL > 0, o projeto cria valor acima do custo de capital. TIR = taxa onde VPL = 0 (calculada por Newton-Raphson + bisseção). Payback simples: período em que saldo acumu...
AI agents call calcular_vpl_tir 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 |
|---|---|---|---|
fluxosCents | array | Yes | Array de fluxos de caixa em centavos. O primeiro elemento (índice 0) deve ser negativo (investimento inicial). Os demais são retornos esperados em cada período. |
periodicidade | string | — | Periodicidade dos fluxos de caixa: "anual" (cada elemento representa um ano) ou "mensal" (cada elemento representa um mês). A taxa anual é convertida internamen |
taxaDescontoAnualPercent | number | Yes | Taxa mínima de atratividade (TMA) ou custo de capital em % ao ano. Usada para descontar os fluxos futuros ao valor presente. Ex: 10.0 = 10% a.a. (projeto viável |
Parameters from the server's own tool schema.
This is a pure computational tool that analyzes investment metrics based on input cash flows and discount rates. It reads parameters, performs mathematical calculations, and returns analysis results. There are no side effects, no data persistence changes, no financial transactions executed, and no destructive operations.
From the tool's definition Tool performs financial calculations (VPL, TIR, payback, profitability index) on provided investment project parameters. Description explicitly shows it 'Calcula' (calculates) using formulas and mathematical methods (Newton-Raphson, bisection).
Attacks that exploit this kind of access
Calcula VPL (Valor Presente Líquido) e TIR (Taxa Interna de Retorno) de um projeto de investimento. VPL = Σ [FC_t / (1+r)^t] — se VPL > 0, o projeto cria valor acima do custo de capital. TIR = taxa onde VPL = 0 (calculada por Newton-Raphson + bisseção). Payback simples: período em que saldo acumulado fica positivo. Payback descontado: mesmo critério, mas com fluxos trazidos ao valor presente. Índice de Lucratividade = (VPL + investimento) / investimento. Viável = VPL > 0 E TIR > taxa de desconto. It is categorised as a Read tool in the Contaí — Calculadoras Fiscais Brasileiras MCP Server, which means it retrieves data without modifying state.
calcular_vpl_tir accepts 3 parameters: fluxosCents, periodicidade, taxaDescontoAnualPercent. Required: fluxosCents, taxaDescontoAnualPercent. 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_vpl_tir: 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_vpl_tir 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_vpl_tir 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_vpl_tir. 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_vpl_tir 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.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
Teams ship this data inside their own products. See what a licence covers →