# calcular_dias_entre_datas

Calcula a diferença entre duas datas em dias corridos, dias úteis, semanas, meses e anos. Dias úteis: exclui sábados e domingos (feriados nacionais/estaduais não são modelados). Útil para prazos de contratos, vencimentos, contagem regressiva.

Agent View of the PolicyLayer registry record for `calcular_dias_entre_datas`. HTML page: https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-dias-entre-datas

## Facts

- Tool: `calcular_dias_entre_datas`
- Server: Contaí — Calculadoras Fiscais Brasileiras (`@contai-evoluke/mcp-server`) — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server.md
- Install: `npx -y @contai-evoluke/mcp-server`
- Homepage: https://github.com/lfhillesheim/calculadora
- Risk category: Read (Low risk)
- Registry record: grade B, identity unverified
- Server rate-limited: no
- Parameters: 4 (3 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `dataFim` | string | yes | Data de fim no formato YYYY-MM-DD |
| `dataInicio` | string | yes | Data de início no formato YYYY-MM-DD |
| `currentDate` | string | no | Data de referência YYYY-MM-DD para tabelas fiscais (INSS/IRRF/IOF/etc.). Default: hoje. |
| `diasUteisApenas` | boolean | yes | Se true, retorna apenas dias úteis (exclui fins de semana); não modela feriados |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "calcular_dias_entre_datas",
    "arguments": {
      "dataFim": "<dataFim>",
      "dataInicio": "<dataInicio>",
      "diasUteisApenas": false
    }
  }
}
```

## Why calcular_dias_entre_datas is rated Low

This tool is a pure computational utility that takes two dates as input and returns calculated time differences. It has no side effects, does not modify any state, and does not trigger external operations. It is purely informational/analytical in nature, fitting the 'Read' category for tools that retrieve or query data without side effects.

From the tool's own definition: "Tool 'calcular_dias_entre_datas' performs a calculation that 'Calcula a diferença entre duas datas em dias corridos, dias úteis, semanas, meses e anos.' No modification, deletion, or external operations occur—it only retrieves or computes a derived result…"

## Use case

AI agents call calcular_dias_entre_datas 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.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Contaí — Calculadoras Fiscais Brasileiras:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "calcular_dias_entre_datas": {}
  }
}
```

## Other tools on Contaí — Calculadoras Fiscais Brasileiras (138)

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- `calcular_auxilio_doenca` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-auxilio-doenca.md
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- `calcular_bdr_vs_etf_vs_acao_direta` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-bdr-vs-etf-vs-acao-direta.md
- `calcular_bola_de_neve_dividas` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-bola-de-neve-dividas.md
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- `calcular_calorias_macros` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-calorias-macros.md
- `calcular_capital_de_giro_necessario` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-capital-de-giro-necessario.md
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- `calcular_comparador_regime_tributario` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-comparador-regime-tributario.md
- `calcular_consorcio_credito_empresarial` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-consorcio-credito-empresarial.md
- `calcular_consorcio_vs_financiamento` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-consorcio-vs-financiamento.md
- `calcular_consultoria_pj_saude_financeira` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-consultoria-pj-saude-financeira.md
- `calcular_consumo_agua` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-consumo-agua.md
- `calcular_conversao_moedas_iof` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-conversao-moedas-iof.md
- `calcular_credito_pj_comparador` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-credito-pj-comparador.md
- `calcular_custo_efetivo_total` — Read — https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server/calcular-custo-efetivo-total.md
- …and 108 more: https://policylayer.com/tools/io-github-lfhillesheim-contai-mcp-server.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-lfhillesheim-contai-mcp-server · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-lfhillesheim-contai-mcp-server