# Dados B3 (io.github.Val7h/dados-b3): tool descriptions scored

- tools/list taken: 2026-11-02 (UTC)
- From: [Official MCP Registry](https://registry.modelcontextprotocol.io/v0/servers/io.github.Val7h%2Fdados-b3/versions/latest)
- Connected to: https://dadosb3.com/mcp/
- Repository: https://github.com/Val7h/dados-b3-mcp
- Scoring rules: v2
- Tools: 32
- Average: 37.0 / 100 (Rain)
- Near-identical pairs: 0

This page shows how Dados B3 (io.github.Val7h/dados-b3)'s tool descriptions scored, the issues found and the names of its tools and parameters. The descriptions are the server's own: read them where the copy came from.

Forecall asked the URL this server lists in the official MCP Registry for its tools/list once, on the date above, without calling any tool. The server may have changed since.

## Across the server

- Minor: 32 tools. Above 25, models start to tell tools apart less well.
- Minor: The server has no instructions. Say there, once, what the server is for and when to use it: Claude Code and Gemini CLI read the instructions before the tool descriptions.

## Tools

- `reapresentacoes`: 29 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, chave_api.
  - Minor: String arguments with no constraint or example: ticker.
  - Minor: Says nothing about what it returns.
- `scores`: 29 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, chave_api.
  - Minor: String arguments with no constraint or example: ticker.
  - Minor: Says nothing about what it returns.
- `metodologia`: 31 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: nome.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `veredito`: 32 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker.
  - Minor: String arguments with no constraint or example: ticker.
  - Minor: Says nothing about what it returns.
- `acessos_telecom`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: servico, cnpj, de, ate.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `bdr`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, tipo, serie, de, ate, chave_api.
  - Minor: No `required` list, so every argument is optional.
  - Minor: The meaning of the boolean argument serie is unclear.
  - Minor: Says nothing about what it returns.
- `eventos`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, chave_api.
  - Minor: String arguments with no constraint or example: ticker.
  - Minor: Says nothing about what it returns.
- `fatos_contabeis`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, trimestral, chave_api.
  - Minor: String arguments with no constraint or example: ticker.
  - Minor: The meaning of the boolean argument trimestral is unclear.
  - Minor: Says nothing about what it returns.
- `fatos_relevantes`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, limite, categoria.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `fiis_ranking`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: chave_api.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `fundos_investimento`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: cnpj, busca, limite.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `indicadores_anuais`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, chave_api.
  - Minor: String arguments with no constraint or example: ticker.
  - Minor: Says nothing about what it returns.
- `indice`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: codigo, serie, de, ate, media_curta, media_longa, chave_api.
  - Minor: No `required` list, so every argument is optional.
  - Minor: The meaning of the boolean argument serie is unclear.
  - Minor: Says nothing about what it returns.
- `multiplos`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, chave_api.
  - Minor: String arguments with no constraint or example: ticker.
  - Minor: Says nothing about what it returns.
- `producao_petroleo_gas`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: nivel, periodo, cnpj, operador, campo, de, ate.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `tesouro_direto`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: titulo, vencimento, data, de, ate.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `trimestres`: 34 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, chave_api.
  - Minor: String arguments with no constraint or example: ticker.
  - Minor: Says nothing about what it returns.
- `desempenho`: 36 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, de, ate, media_curta, media_longa, chave_api.
  - Minor: String arguments with no constraint or example: ticker.
  - Minor: Says nothing about what it returns.
- `etf`: 36 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, chave_api, serie, de, ate.
  - Minor: String arguments with no constraint or example: ticker.
  - Minor: The meaning of the boolean argument serie is unclear.
  - Minor: Says nothing about what it returns.
- `fii`: 36 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, chave_api, serie, de, ate.
  - Minor: String arguments with no constraint or example: ticker.
  - Minor: The meaning of the boolean argument serie is unclear.
  - Minor: Says nothing about what it returns.
- `precos`: 36 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, de, ate, limite, campos, chave_api.
  - Minor: String arguments with no constraint or example: ticker.
  - Minor: Says nothing about what it returns.
- `auditar_amostra`: 37 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: semente, n.
  - Minor: Says nothing about what it returns.
- `screener`: 37 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: filtros, ano, as_of, recibo, chave_api, rigor.
  - Minor: The meaning of the boolean argument recibo is unclear.
  - Minor: Says nothing about what it returns.
- `screener_fiis`: 37 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: filtros, chave_api.
  - Minor: Says nothing about what it returns.
- `tarifas_energia`: 37 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: cnpj, de, ate.
  - Minor: No `required` list, so every argument is optional.
  - Minor: Says nothing about what it returns.
- `dividendos`: 41 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: ticker, chave_api.
  - Minor: String arguments with no constraint or example: ticker.
- `listas`: 41 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: lista, limite, chave_api.
  - Minor: No `required` list, so every argument is optional.
- `saude`: 42 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `dicionario`: 49 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `etfs_ranking`: 49 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `hoje`: 54 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `listar_empresas`: 54 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.

Is your server listed here and you would rather it were not? Email support@forecall.dev, and we will take it off within 7 days.

[All scored servers](https://forecall.dev/en/servers)