Compara renda fixa em dólar (Treasury, ETF Bond, CDB-USD) com CDI brasileiro. Considera IOF câmbio + carnê-leão sobre juros + GCAP sobre ganho cambial. Retorna: liquidoBrlCents, rentabilidadeLiquidaAnualBrlPercent, comparativoCdiBrlPercent, tributoTotalCents, irCarneleaoMensalTotalCents, irGanhoC...
AI agents call calcular_renda_fixa_em_dolar 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 |
|---|---|---|---|
tipoAtivo | string | Yes | Tipo de ativo: treasury_bond | etf_bond | cdb_dolar_brasileiro | bond_corporativo |
prazoMeses | integer | Yes | Prazo do investimento em meses (1 a 600) |
cambioAplicacao | number | Yes | Câmbio BRL/USD na data de aplicação. Ex: 5.20 |
taxaAnualPercentUsd | number | Yes | Taxa de juros anual em USD (%). Ex: 4.5 para Treasury 10y |
cambioResgateEstimado | number | Yes | Câmbio BRL/USD estimado na data de resgate |
valorAplicadoUsdCents | integer | Yes | Valor aplicado em USD em centavos. Ex: USD 10.000 = 1000000 |
cdiAnualPercentReferencia | number | — | CDI brasileiro anual de referência para comparação (%). Default 13. |
Parameters from the server's own tool schema.
This tool performs financial calculations and comparisons (Treasury, ETF Bond, CDB-USD vs CDI) with tax considerations (IOF, carnê-leão, GCAP), but only returns computed results. It does not create, modify, delete, or execute external code/commands—it reads input parameters and returns calculated outputs.
From the tool's definition Tool name 'calcular_renda_fixa_em_dolar' and description 'Compares fixed income in dollars... Returns: liquidoBrlCents, rentabilidadeLiquidaAnualBrlPercent...' indicate calculation and comparison operations that retrieve/compute financial data without…
Attacks that exploit this kind of access
Compara renda fixa em dólar (Treasury, ETF Bond, CDB-USD) com CDI brasileiro. Considera IOF câmbio + carnê-leão sobre juros + GCAP sobre ganho cambial. Retorna: liquidoBrlCents, rentabilidadeLiquidaAnualBrlPercent, comparativoCdiBrlPercent, tributoTotalCents, irCarneleaoMensalTotalCents, irGanhoCambialCents. It is categorised as a Read tool in the Contaí — Calculadoras Fiscais Brasileiras MCP Server, which means it retrieves data without modifying state.
calcular_renda_fixa_em_dolar accepts 7 parameters: tipoAtivo, prazoMeses, cambioAplicacao, taxaAnualPercentUsd, cambioResgateEstimado, valorAplicadoUsdCents, cdiAnualPercentReferencia. Required: tipoAtivo, prazoMeses, cambioAplicacao, taxaAnualPercentUsd, cambioResgateEstimado, valorAplicadoUsdCents. 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_renda_fixa_em_dolar: 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_renda_fixa_em_dolar 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_renda_fixa_em_dolar 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_renda_fixa_em_dolar. 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_renda_fixa_em_dolar 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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