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

tools/list taken: 2026-11-02 (UTC)
From: Official MCP Registry
Connected to: https://dadosb3.com/mcp/
Repository: github.com/Val7h/dados-b3-mcp
Scoring rules: v2
Removal: support@forecall.dev

Scores, issues and names only

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.

servers/io.github.Val7h/dados-b3

Average score: 37.0 / 100Rain
Tools: 32
Near-identical descriptions: 0

Across the server

Minor
32 tools. Above 25, models start to tell tools apart less well.many_tools
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.instructions_missing

Tools

reapresentacoes

29 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, chave_api.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param
Minor
Says nothing about what it returns.no_return_info

scores

29 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, chave_api.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param
Minor
Says nothing about what it returns.no_return_info

metodologia

31 / 100Rain

Purpose: 14 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: nome.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

veredito

32 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 3 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param
Minor
Says nothing about what it returns.no_return_info

acessos_telecom

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: servico, cnpj, de, ate.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

bdr

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, tipo, serie, de, ate, chave_api.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument serie is unclear.vague_boolean
Minor
Says nothing about what it returns.no_return_info

eventos

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, chave_api.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param
Minor
Says nothing about what it returns.no_return_info

fatos_contabeis

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, trimestral, chave_api.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param
Minor
The meaning of the boolean argument trimestral is unclear.vague_boolean
Minor
Says nothing about what it returns.no_return_info

fatos_relevantes

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, limite, categoria.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

fiis_ranking

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: chave_api.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

fundos_investimento

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: cnpj, busca, limite.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

indicadores_anuais

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, chave_api.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param
Minor
Says nothing about what it returns.no_return_info

indice

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: codigo, serie, de, ate, media_curta, media_longa, chave_api.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
The meaning of the boolean argument serie is unclear.vague_boolean
Minor
Says nothing about what it returns.no_return_info

multiplos

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, chave_api.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param
Minor
Says nothing about what it returns.no_return_info

producao_petroleo_gas

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: nivel, periodo, cnpj, operador, campo, de, ate.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

tesouro_direto

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: titulo, vencimento, data, de, ate.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

trimestres

34 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, chave_api.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param
Minor
Says nothing about what it returns.no_return_info

desempenho

36 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 7 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, de, ate, media_curta, media_longa, chave_api.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param
Minor
Says nothing about what it returns.no_return_info

etf

36 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 7 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, chave_api, serie, de, ate.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param
Minor
The meaning of the boolean argument serie is unclear.vague_boolean
Minor
Says nothing about what it returns.no_return_info

fii

36 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 7 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, chave_api, serie, de, ate.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param
Minor
The meaning of the boolean argument serie is unclear.vague_boolean
Minor
Says nothing about what it returns.no_return_info

precos

36 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 7 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, de, ate, limite, campos, chave_api.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param
Minor
Says nothing about what it returns.no_return_info

auditar_amostra

37 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 8 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: semente, n.param_no_description
Minor
Says nothing about what it returns.no_return_info

screener

37 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 8 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: filtros, ano, as_of, recibo, chave_api, rigor.param_no_description
Minor
The meaning of the boolean argument recibo is unclear.vague_boolean
Minor
Says nothing about what it returns.no_return_info

screener_fiis

37 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 8 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: filtros, chave_api.param_no_description
Minor
Says nothing about what it returns.no_return_info

tarifas_energia

37 / 100Rain

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 0 / 15
Constraints and side effects: 10 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: cnpj, de, ate.param_no_description
Minor
No `required` list, so every argument is optional.no_required
Minor
Says nothing about what it returns.no_return_info

dividendos

41 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 7 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: ticker, chave_api.param_no_description
Minor
String arguments with no constraint or example: ticker.loose_string_param

listas

41 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 5 / 25
Return value: 7 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Major
Arguments without a description: lista, limite, chave_api.param_no_description
Minor
No `required` list, so every argument is optional.no_required

saude

42 / 100Cloudy

Purpose: 10 / 20
When to use: 0 / 20
Arguments: 25 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info

dicionario

49 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 25 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info

etfs_ranking

49 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 25 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 0 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info

hoje

54 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 25 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info

listar_empresas

54 / 100Cloudy

Purpose: 17 / 20
When to use: 0 / 20
Arguments: 25 / 25
Return value: 0 / 15
Constraints and side effects: 7 / 10
Examples: 5 / 10

Major
Says nothing about when to use it, or when not to.no_usage_context
Minor
Says nothing about what it returns.no_return_info

What static scoring cannot tell

This score reads only the text of each description and schema: it says what is written, not what a model will do. Short tools whose names already say what they do, such as browser_close, score low here even when models use them well, and in our measurements current models chose the right tool in one step even from one-line descriptions, as long as the names and schemas differed. What the text cannot show, such as what happens over several steps and whether an added sentence helps or misleads, is what an evaluation measures, on the Pro and Team plans.

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