calcular_itbi

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

Low RISK CLASS

Category Read

Parameters 41 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-itbi.md

WHAT IT DOES

What calcular_itbi does on Contaí — Calculadoras Fiscais Brasileiras

AI agents call calcular_itbi 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
`aliquotaPercent`	number	—	Alíquota municipal (%). SP=3, Blumenau=2, capitais ~2-3%. Default 3.
`valorVenalCents`	integer	—	Valor venal de referência do município em centavos (opcional). Quando informado, a base de cálculo será max(valorVenalCents, valorTransacaoCents). Se omitido, u
`sfhPrimeiroImovel`	boolean	—	SFH 1º imóvel: redução 50% até R$ 109.733,02 (teto SFH 2026), excedente paga cheio. Default false.
`valorTransacaoCents`	integer	Yes	Valor da transação (preço de compra e venda) em centavos

Parameters from the server's own tool schema.

RISK

Why calcular_itbi is rated Low

This is a pure calculation/query tool that retrieves or computes tax information based on input parameters and legal rules. It does not create, modify, delete, or execute financial transactions. It provides informational output (calculation results) without side effects.

From the tool's definition Tool name 'calcular_itbi' and description explicitly states it 'Calcula' (calculates) and 'Retorna valor a pagar + alíquota efetiva' (returns value to pay + effective rate).

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs calcular_itbi 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_itbi, this is the rule to start with:

calcular_itbi Allowed

calcular_itbi 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_itbi": {}
  }
}

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_itbi call is checked against it from then on.

FAQ

Questions about calcular_itbi

What does the calcular_itbi tool do? +

Calcula ITBI (imposto de transmissão de bem imóvel) na compra. Tributo municipal pago à prefeitura na escritura. Alíquota varia por município (1.5%-3%). A base de cálculo é o maior entre o valor da transação e o valor venal de referência da prefeitura. Imóveis pelo SFH (1º imóvel familiar) têm redução 50% até teto SFH (R$ 109.733,02 em 2026). Retorna valor a pagar + alíquota efetiva. Fonte: CTN art. 156 III + Lei 8.692/93 (SFH) + legislação municipal. 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_itbi accept? +

calcular_itbi accepts 4 parameters: aliquotaPercent, valorVenalCents, sfhPrimeiroImovel, valorTransacaoCents. Required: valorTransacaoCents. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on calcular_itbi? +

Register the Contaí — Calculadoras Fiscais Brasileiras MCP server in PolicyLayer and add a rule for calcular_itbi: 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_itbi? +

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

Can I rate-limit calcular_itbi? +

Yes. Add a rate_limit block to the calcular_itbi 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_itbi completely? +

Set action: deny in the PolicyLayer policy for calcular_itbi. 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_itbi? +

calcular_itbi 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.

KEEP EXPLORING

More on Contaí — Calculadoras Fiscais Brasileiras, and thousands of servers like it.

This server

All 139 Contaí — Calculadoras Fiscais Brasileiras tools →

Across the catalogue

The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →