calculate_cet
Calcula o CET (Custo Efetivo Total) de uma proposta de crédito a partir do que o tomador vê: valor que cai na conta, número de parcelas e valor da parcela. O juro embutido sai por TIR, então tarifas e seguros descontados do valor liberado entram na taxa. Chame duas vezes pra comparar propostas. P...
This record as markdown: /tools/com-falazuki-finance-br/calculate-cet.md
What calculate_cet does on FalaZuki Finance BR
AI agents call calculate_cet to retrieve information from FalaZuki Finance BR 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 |
|---|---|---|---|
installments | integer | Yes | Número de parcelas |
net_received | number | Yes | Valor que efetivamente CAI NA CONTA, em R$ (depois de tarifas embutidas) |
installment_value | number | Yes | Valor de cada parcela, em R$ |
Parameters from the server's own tool schema.
Why calculate_cet is rated Low
Even though calculate_cet only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs calculate_cet safely
PolicyLayer is an MCP gateway: it sits between your AI agents and FalaZuki Finance BR, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For calculate_cet, this is the rule to start with:
calculate_cet is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect FalaZuki Finance BR, apply this rule, and every calculate_cet call is checked against it from then on.
Questions about calculate_cet
Calcula o CET (Custo Efetivo Total) de uma proposta de crédito a partir do que o tomador vê: valor que cai na conta, número de parcelas e valor da parcela. O juro embutido sai por TIR, então tarifas e seguros descontados do valor liberado entram na taxa. Chame duas vezes pra comparar propostas. Parâmetros obrigatórios: net_received, installments, installment_value. Use exatamente estes nomes, em inglês. It is categorised as a Read tool in the FalaZuki Finance BR MCP Server, which means it retrieves data without modifying state.
calculate_cet accepts 3 parameters: installments, net_received, installment_value. Required: installments, net_received, installment_value. The full parameter table on this page comes from the server's own tool schema.
Register the FalaZuki Finance BR MCP server in PolicyLayer and add a rule for calculate_cet: 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 FalaZuki Finance BR. Nothing to install.
calculate_cet 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 calculate_cet 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 calculate_cet. 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.
calculate_cet is provided by the FalaZuki Finance BR MCP server (https://mcp.falazuki.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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