Dados Abertos Senado BR MCP

Votações em comissão

senado_votacao_comissao

Read-onlyIdempotent

Lista votações em comissões. O parâmetro por (padrão comissao) define o eixo da consulta: por: comissao → exige siglaComissao; lista as votações daquela comissão. por: senador → exige codigoSenador; lista os votos do senador em comissões (filtro opcional comissao). por: materia → exige sigla, numero e ano (ex.: PL 2630/2020); lista as votações da proposição em comissões (filtro opcional comissao). Em todos os casos aceita período opcional dataInicio/dataFim (YYYYMMDD, filtrado pela data da reunião) e retorna { por, ...contexto, count, votacoes }, cada votação com codigo, data, comissao, reuniao, materia, descricao, totais computados dos votos (totalSim/totalNao/totalAbstencao) e votos (senador, partido, voto). Sem paginação. Períodos amplos podem estourar o tempo-limite da consulta (erro de timeout): prefira janelas de até 3 meses e divida períodos maiores em chamadas sucessivas. Obtenha siglas via senado_listar_comissoes, codigoSenador via senado_listar_senadores; para votações no plenário use senado_votos_materia. Atenção: o codigo de cada votação de comissão pertence a um espaço de numeração próprio e NÃO é válido em senado_obter_votacao (que é exclusivo de plenário) — podem coincidir numericamente, mas apontam para votações diferentes.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`ano`	No	Ano da proposição (obrigatório quando por=materia)
`por`	No	Eixo da consulta: comissao, senador ou materia	comissao
`sigla`	No	Sigla do tipo da proposição (obrigatório quando por=materia; ex: PL, PEC)
`numero`	No	Número da proposição (obrigatório quando por=materia)
`dataFim`	No	Data fim (YYYYMMDD)
`comissao`	No	Sigla da comissão para filtrar (por=senador ou por=materia)
`dataInicio`	No	Data início (YYYYMMDD)
`codigoSenador`	No	Código do senador (obrigatório quando por=senador)
`siglaComissao`	No	Sigla da comissão (obrigatório quando por=comissao; ex: CCJ, CAE)

Output Schema

TableJSON Schema

Name	Required	Description	Default
`provenance`	Yes
`attribution`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 8, 2026

changedOutput schema / properties / provenance / anyOf

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Changed1 schema field changedOct 6, 2026

changedOutput schema / properties / provenance / anyOf

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+                "boolean",
+                "null"
+              ]
+            },
+            "source_url": {
+              "type": "string"
+            }
+          },
+          "required": [
+            "fields",
+            "source_url",
+            "dataset_id",
+            "data_vintage",
+            "retrieved_at"
+          ],
+          "type": "object"
+        },
+        "minItems": 1,
+        "type": "array"
+      },
+      "license": {
+        "type": [
+          "string",
+          "null"
+        ]
+      },
+      "retrieval": {
+        "anyOf": [
+          {
+            "additionalProperties": false,
+            "properties": {
+              "anomalies": {
+                "items": {
+                  "additionalProperties": false,
+                  "properties": {
+                    "count": {
+                      "maximum": 9007199254740991,
+                      "minimum": 1,
+                      "type": "integer"
+                    },
+                    "kind": {
+                      "enum": [
+                        "timeout",
+                        "network",
+                        "http_4xx",
+                        "http_5xx",
+                        "rate_limited",
+                        "malformed_body"
+                      ],
+                      "type": "string"
+                    }
+                  },
+                  "required": [
+                    "kind",
+                    "count"
+                  ],
+                  "type": "object"
+                },
+                "type": "array"
+              },
+              "attempts": {
+                "maximum": 9007199254740991,
+                "minimum": 1,
+                "type": "integer"
+              },
+              "requests": {
+                "maximum": 9007199254740991,
+                "minimum": 1,
+                "type": "integer"
+              },
+              "unstable": {
+                "type": "boolean"
+              }
+            },
+            "required": [
+              "requests",
+              "attempts",
+              "anomalies",
+              "unstable"
+            ],
+            "type": "object"
+          },
+          {
+            "type": "null"
+          }
+        ]
+      },
+      "retrieved_at": {
+        "type": "string"
+      },
+      "source": {
+        "type": "string"
+      },
+      "source_url": {
+        "type": "string"
+      }
+    },
+    "required": [
+      "source",
+      "source_url",
+      "data_vintage",
+      "retrieved_at",
+      "retrieval",
+      "citation",
+      "license"
+    ],
+    "type": "object"
+  },
+  {
+    "items": {
+      "additionalProperties": false,
+      "properties": {
+        "citation": {
+          "type": "string"
+        },
+        "data_vintage": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "field_sources": {
+          "items": {
+            "additionalProperties": false,
+            "properties": {
+              "data_vintage": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "dataset_id": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "fields": {
+                "items": {
+                  "type": "string"
+                },
+                "minItems": 1,
+                "type": "array"
+              },
+              "retrieved_at": {
+                "type": [
+                  "string",
+                  "null"
+                ]
+              },
+              "served_from_cache": {
+                "type": [
+                  "boolean",
+                  "null"
+                ]
+              },
+              "source_url": {
+                "type": "string"
+              }
+            },
+            "required": [
+              "fields",
+              "source_url",
+              "dataset_id",
+              "data_vintage",
+              "retrieved_at"
+            ],
+            "type": "object"
+          },
+          "minItems": 1,
+          "type": "array"
+        },
+        "license": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "retrieval": {
+          "anyOf": [
+            {
+              "additionalProperties": false,
+              "properties": {
+                "anomalies": {
+                  "items": {
+                    "additionalProperties": false,
+                    "properties": {
+                      "count": {
+                        "maximum": 9007199254740991,
+                        "minimum": 1,
+                        "type": "integer"
+                      },
+                      "kind": {
+                        "enum": [
+                          "timeout",
+                          "network",
+                          "http_4xx",
+                          "http_5xx",
+                          "rate_limited",
+                          "malformed_body"
+                        ],
+                        "type": "string"
+                      }
+                    },
+                    "required": [
+                      "kind",
+                      "count"
+                    ],
+                    "type": "object"
+                  },
+                  "type": "array"
+                },
+                "attempts": {
+                  "maximum": 9007199254740991,
+                  "minimum": 1,
+                  "type": "integer"
+                },
+                "requests": {
+                  "maximum": 9007199254740991,
+                  "minimum": 1,
+                  "type": "integer"
+                },
+                "unstable": {
+                  "type": "boolean"
+                }
+              },
+              "required": [
+                "requests",
+                "attempts",
+                "anomalies",
+                "unstable"
+              ],
+              "type": "object"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "retrieved_at": {
+          "type": "string"
+        },
+        "source": {
+          "type": "string"
+        },
+        "source_url": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "source",
+        "source_url",
+        "data_vintage",
+        "retrieved_at",
+        "retrieval",
+        "citation",
+        "license"
+      ],
+      "type": "object"
+    },
+    "minItems": 1,
+    "type": "array"
+  }
+]

Changed3 schema fields changedOct 4, 2026

addedOutput schema / properties / attribution

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

addedOutput schema / properties / provenance

Added value: +{
+  "anyOf": [
+    {
+      "additionalProperties": false,
+      "properties": {
+        "citation": {
+          "type": "string"
+        },
+        "data_vintage": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "license": {
+          "type": [
+            "string",
+            "null"
+          ]
+        },
+        "retrieval": {
+          "anyOf": [
+            {
+              "additionalProperties": false,
+              "properties": {
+                "anomalies": {
+                  "items": {
+                    "additionalProperties": false,
+                    "properties": {
+                      "count": {
+                        "maximum": 9007199254740991,
+                        "minimum": 1,
+                        "type": "integer"
+                      },
+                      "kind": {
+                        "enum": [
+                          "timeout",
+                          "network",
+                          "http_4xx",
+                          "http_5xx",
+                          "rate_limited",
+                          "malformed_body"
+                        ],
+                        "type": "string"
+                      }
+                    },
+                    "required": [
+                      "kind",
+                      "count"
+                    ],
+                    "type": "object"
+                  },
+                  "type": "array"
+                },
+                "attempts": {
+                  "maximum": 9007199254740991,
+                  "minimum": 1,
+                  "type": "integer"
+                },
+                "requests": {
+                  "maximum": 9007199254740991,
+                  "minimum": 1,
+                  "type": "integer"
+                },
+                "unstable": {
+                  "type": "boolean"
+                }
+              },
+              "required": [
+                "requests",
+                "attempts",
+                "anomalies",
+                "unstable"
+              ],
+              "type": "object"
+            },
+            {
+              "type": "null"
+            }
+          ]
+        },
+        "retrieved_at": {
+          "type": "string"
+        },
+        "source": {
+          "type": "string"
+        },
+        "source_url": {
+          "type": "string"
+        }
+      },
+      "required": [
+        "source",
+        "source_url",
+        "data_vintage",
+        "retrieved_at",
+        "retrieval",
+        "citation",
+        "license"
+      ],
+      "type": "object"
+    },
+    {
+      "items": {
+        "additionalProperties": false,
+        "properties": {
+          "citation": {
+            "type": "string"
+          },
+          "data_vintage": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "license": {
+            "type": [
+              "string",
+              "null"
+            ]
+          },
+          "retrieval": {
+            "anyOf": [
+              {
+                "additionalProperties": false,
+                "properties": {
+                  "anomalies": {
+                    "items": {
+                      "additionalProperties": false,
+                      "properties": {
+                        "count": {
+                          "maximum": 9007199254740991,
+                          "minimum": 1,
+                          "type": "integer"
+                        },
+                        "kind": {
+                          "enum": [
+                            "timeout",
+                            "network",
+                            "http_4xx",
+                            "http_5xx",
+                            "rate_limited",
+                            "malformed_body"
+                          ],
+                          "type": "string"
+                        }
+                      },
+                      "required": [
+                        "kind",
+                        "count"
+                      ],
+                      "type": "object"
+                    },
+                    "type": "array"
+                  },
+                  "attempts": {
+                    "maximum": 9007199254740991,
+                    "minimum": 1,
+                    "type": "integer"
+                  },
+                  "requests": {
+                    "maximum": 9007199254740991,
+                    "minimum": 1,
+                    "type": "integer"
+                  },
+                  "unstable": {
+                    "type": "boolean"
+                  }
+                },
+                "required": [
+                  "requests",
+                  "attempts",
+                  "anomalies",
+                  "unstable"
+                ],
+                "type": "object"
+              },
+              {
+                "type": "null"
+              }
+            ]
+          },
+          "retrieved_at": {
+            "type": "string"
+          },
+          "source": {
+            "type": "string"
+          },
+          "source_url": {
+            "type": "string"
+          }
+        },
+        "required": [
+          "source",
+          "source_url",
+          "data_vintage",
+          "retrieved_at",
+          "retrieval",
+          "citation",
+          "license"
+        ],
+        "type": "object"
+      },
+      "minItems": 1,
+      "type": "array"
+    }
+  ]
+}

addedOutput schema / required

Added value: +[
+  "provenance",
+  "attribution"
+]

Changed1 schema field changedSep 11, 2026
- addedInput schema / additionalProperties
```
Added value: +false
```

Changed2 schema fields changedAug 31, 2026

changedInput schema / $schema

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

changedOutput schema / $schema

Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"

Changed4 schema fields changedJun 28, 2026
- removedInput schema / additionalProperties
```
Removed value: -false
```
- addedInput schema / properties / codigoSenador / maximum
```
Added value: +9007199254740991
```
- addedInput schema / properties / numero / maximum
```
Added value: +9007199254740991
```
- changedOutput schema / additionalProperties
```
Previous value: -trueNew value: +{}
```

Changed8 schema fields changedJun 14, 2026

addedInput schema / properties / ano

Added value: +{
+  "description": "Ano da proposição (obrigatório quando por=materia)",
+  "maximum": 2100,
+  "minimum": 1900,
+  "type": "integer"
+}

addedInput schema / properties / codigoSenador

Added value: +{
+  "description": "Código do senador (obrigatório quando por=senador)",
+  "exclusiveMinimum": 0,
+  "type": "integer"
+}

addedInput schema / properties / comissao

Added value: +{
+  "description": "Sigla da comissão para filtrar (por=senador ou por=materia)",
+  "type": "string"
+}

addedInput schema / properties / numero

Added value: +{
+  "description": "Número da proposição (obrigatório quando por=materia)",
+  "exclusiveMinimum": 0,
+  "type": "integer"
+}

addedInput schema / properties / por

Added value: +{
+  "default": "comissao",
+  "description": "Eixo da consulta: comissao, senador ou materia",
+  "enum": [
+    "comissao",
+    "senador",
+    "materia"
+  ],
+  "type": "string"
+}

addedInput schema / properties / sigla

Added value: +{
+  "description": "Sigla do tipo da proposição (obrigatório quando por=materia; ex: PL, PEC)",
+  "minLength": 2,
+  "type": "string"
+}

changedInput schema / properties / siglaComissao / description

Previous value: -"Sigla da comissão (ex: CCJ, CAE)"New value: +"Sigla da comissão (obrigatório quando por=comissao; ex: CCJ, CAE)"

removedInput schema / required
```
Removed value: -[
-  "siglaComissao"
-]
```

Changed1 schema field changedJun 13, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "$schema": "http://json-schema.org/draft-07/schema#",
+  "additionalProperties": true,
+  "properties": {},
+  "type": "object"
+}

First observedJun 13, 2026

TDQS

A4.8/5.0

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Goes well past the readOnly/idempotent annotations by disclosing that there is no pagination, that broad periods can hit a query timeout, that windows of up to 3 months are preferable with larger ranges split across calls, and that committee votacao codes live in a separate numbering space from plenary codes.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The content is dense and front-loaded, leading with the purpose before the mode breakdown. It is a single long block and partially restates the per-mode required parameters already present in the schema, which costs some efficiency.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a 9-parameter, multi-mode query tool this covers everything an agent needs: mode selection, prerequisites, filtering, response shape, and operational limits. The return-structure sentence is slightly redundant given the output schema, but harmless.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the formal requirements already exist, but the description adds conditional dependencies (which params each `por` value demands), a worked example (PL 2630/2020), the YYYYMMDD format, and the detail that date filtering is by meeting date.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('Lista votações em comissões') and immediately narrows scope to committee votes, distinguishing it from plenary siblings. It explicitly names senado_votos_materia for plenary and warns that this tool's votacao `codigo` is not valid in senado_obter_votacao.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage is spelled out per mode: `por: comissao` requires siglaComissao, `por: senador` requires codigoSenador with optional comissao filter, `por: materia` requires sigla/numero/ano. It routes the agent to senado_listar_comissoes and senado_listar_senadores for lookups and to senado_votos_materia when plenary data is wanted.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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