calcular_custo_real_cartao

SERVERContaí — Calculadoras Fiscais Brasileiras SOURCE@contai-evoluke/mcp-server

Low RISK CLASS

Category Read

Parameters 54 required

Recommended Allowedsee the rule below

Registry record Grade B, identity unverified Pull the record →

This record as markdown: /tools/io-github-lfhillesheim-contai-mcp-server/calcular-custo-real-cartao.md

WHAT IT DOES

What calcular_custo_real_cartao does on Contaí — Calculadoras Fiscais Brasileiras

AI agents call calcular_custo_real_cartao to retrieve information from Contaí — Calculadoras Fiscais Brasileiras without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Parameter	Type	Required	Description
`modalidade`	string	Yes	Modalidade: rotativo (dívida de fatura), parcelado_fatura ou saque em dinheiro
`prazoMeses`	integer	Yes	Prazo de pagamento em meses
`currentDate`	string	—	Data de referência YYYY-MM-DD para tabelas fiscais (INSS/IRRF/IOF/etc.). Default: hoje.
`taxaMensalPercent`	number	Yes	Taxa de juros mensal em % (ex: 15 para 15% a.m. no rotativo)
`valorOriginalCents`	integer	Yes	Valor original da dívida/compra em centavos

Parameters from the server's own tool schema.

RISK

Why calcular_custo_real_cartao is rated Low

Although this tool concerns financial calculations, it is purely computational and informational. It analyzes but does not execute, authorize, or commit any financial transaction. It does not move money, create subscriptions, or bind financial obligations. The tool retrieves/calculates cost estimates based on input parameters, comparable to financial calculators.

From the tool's definition Tool name 'calcular_custo_real_cartao' and description indicate it 'Calcula' (calculates) and 'Retorna' (returns) financial metrics.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs calcular_custo_real_cartao safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Contaí — Calculadoras Fiscais Brasileiras, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For calcular_custo_real_cartao, this is the rule to start with:

calcular_custo_real_cartao Allowed

calcular_custo_real_cartao is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "calcular_custo_real_cartao": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Contaí — Calculadoras Fiscais Brasileiras, apply this rule, and every calcular_custo_real_cartao call is checked against it from then on.

FAQ

Questions about calcular_custo_real_cartao

What does the calcular_custo_real_cartao tool do? +

Calcula o custo real do crédito no cartão (rotativo, parcelamento ou saque). Tabela Price sobre principal + IOF (0,38% fixo + 0,0082%/dia, cap 365d). Saque adiciona +0,38% IOF extra. Lei 14.690/2023: alerta se total excede 2× principal (rotativo/parcelado). Retorna: parcela, total pago, juros, IOF, CET anual, multiplicador do custo. It is categorised as a Read tool in the Contaí — Calculadoras Fiscais Brasileiras MCP Server, which means it retrieves data without modifying state.

What parameters does calcular_custo_real_cartao accept? +

calcular_custo_real_cartao accepts 5 parameters: modalidade, prazoMeses, currentDate, taxaMensalPercent, valorOriginalCents. Required: modalidade, prazoMeses, taxaMensalPercent, valorOriginalCents. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on calcular_custo_real_cartao? +

Register the Contaí — Calculadoras Fiscais Brasileiras MCP server in PolicyLayer and add a rule for calcular_custo_real_cartao: 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.

What risk level is calcular_custo_real_cartao? +

calcular_custo_real_cartao is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit calcular_custo_real_cartao? +

Yes. Add a rate_limit block to the calcular_custo_real_cartao 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.

How do I block calcular_custo_real_cartao completely? +

Set action: deny in the PolicyLayer policy for calcular_custo_real_cartao. 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.

What MCP server provides calcular_custo_real_cartao? +

calcular_custo_real_cartao 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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