Dados Abertos Senado BR MCP

Gastos CEAPS (cota parlamentar)

senado_ceaps

Read-onlyIdempotent

Despesas da Cota para Exercício da Atividade Parlamentar (CEAPS) dos senadores em um ano. A fonte também publica lançamentos NEGATIVOS, sem rótulo próprio (a maioria em passagens aéreas, com jeito de crédito ou estorno): eles entram nas somas e totais como desconto e, nas estatísticas, aparecem como mínimo e no bottom — não leia um valor negativo como erro nem como 'a menor despesa'. Para perguntas de maior/menor/média/mediana/distribuição/ranking ('quem gastou mais CEAPS', 'gasto mediano', 'distribuição das despesas') use estatisticas=true: computa min/máx/média/mediana/desvio/percentis sobre TODAS as despesas filtradas e devolve top/bottom (padrão 10) com identificadores — os modos agregados só somam por grupo e não revelam a distribuição nem o extremo individual. Sem agruparPor → distribuicao das despesas individuais + top/bottom; com agruparPor (senador/tipo/mes/fornecedor) → grupos[] ranqueados por soma decrescente (grupos[0] = maior gastador), cada um com sua mini-distribuição. Sem estatisticas: nos modos agregados (por-senador/por-tipo/por-mes/por-fornecedor, padrão por-senador) traz agregado[] ordenado por total desc com chave, total e despesas (contagem); em modo='detalhe' traz despesas[] (mês, data, senador, tipoDespesa, fornecedor, cnpjCpf, valor). Filtre por mes, codSenador, nomeSenador, tipoDespesa ou fornecedor (busca parcial); limite cap 100 com aviso ao truncar. Obtenha codSenador via senado_listar_senadores.

Input Schema

Name	Required	Description	Default
`ano`	Yes	Ano das despesas
`mes`	No	Filtrar por mês
`modo`	No	Agregação ou detalhe (padrão: por-senador). Ignorado quando estatisticas=true	por-senador
`topN`	No	Tamanho das listas top/bottom quando estatisticas=true sem agruparPor (padrão: 10, máx: 100)
`limite`	No	Máximo de linhas no resultado (padrão: 100)
`agruparPor`	No	Quando estatisticas=true, ranqueia os grupos por soma decrescente (grupos[0] = maior gastador), cada grupo com sua mini-distribuição
`codSenador`	No	Filtrar por código do senador
`fornecedor`	No	Filtrar por fornecedor (busca parcial)
`nomeSenador`	No	Filtrar por nome do senador (busca parcial)
`tipoDespesa`	No	Filtrar por tipo de despesa (busca parcial)
`estatisticas`	No	Computa estatísticas (min/máx/média/mediana/percentis) + ranking top/bottom sobre todas as despesas filtradas. Use para 'quem gastou mais/menos', 'gasto médio/mediano', 'distribuição', 'ranking'

Output Schema

Name	Required	Description	Default
`provenance`	Yes	Bloco de proveniência do portfólio (projeção concise): source, source_url, data_vintage, retrieved_at (horário de Brasília), citation, license, revision e retrieval; field_sources só quando a resposta funde recortes, derived e derivation_note só nos modos de estatísticas. retrieval é o diagnóstico da ida à origem nesta chamada — requisições, tentativas com retentativas, anomalias superadas (timeout, network, rate_limited, http_5xx, http_4xx, malformed_body) e unstable (true quando algo precisou ser repetido) —, ou null quando não foi medido. Lista de blocos quando a chamada consulta várias fontes (índice do search).
`attribution`	Yes	URLs de origem dos dados (as source_url distintas dos blocos de proveniência, incluindo as de field_sources), para linkar a citação

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedOct 28, 2026

addedOutput schema / properties / attribution / description

Added value: +"URLs de origem dos dados (as source_url distintas dos blocos de proveniência, incluindo as de field_sources), para linkar a citação"

addedOutput schema / properties / provenance / description

Added value: +"Bloco de proveniência do portfólio (projeção concise): source, source_url, data_vintage, retrieved_at (horário de Brasília), citation, license, revision e retrieval; field_sources só quando a resposta funde recortes, derived e derivation_note só nos modos de estatísticas. retrieval é o diagnóstico da ida à origem nesta chamada — requisições, tentativas com retentativas, anomalias superadas (timeout, network, rate_limited, http_5xx, http_4xx, malformed_body) e unstable (true quando algo precisou ser repetido) —, ou null quando não foi medido. Lista de blocos quando a chamada consulta várias fontes (índice do search)."

Changed1 schema field changedOct 8, 2026

changedOutput schema / properties / provenance / anyOf

Previous value: -[
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-]New value: +[
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+      "field_sources": {
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+                "null"
+              ]
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+            "source_url": {
+              "type": "string"
+            }
+          },
+          "required": [
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+            "source_url",
+            "dataset_id",
+            "data_vintage",
+            "retrieved_at"
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+]

Changed1 schema field changedOct 6, 2026

changedOutput schema / properties / provenance / anyOf

Previous value: -[
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-                  "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"
-  }
-]New value: +[
+  {
+    "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"
+  },
+  {
+    "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 changedJul 8, 2026

addedInput schema / properties / agruparPor

Added value: +{
+  "description": "Quando estatisticas=true, ranqueia os grupos por soma decrescente (grupos[0] = maior gastador), cada grupo com sua mini-distribuição",
+  "enum": [
+    "senador",
+    "tipo",
+    "mes",
+    "fornecedor"
+  ],
+  "type": "string"
+}

addedInput schema / properties / estatisticas

Added value: +{
+  "default": false,
+  "description": "Computa estatísticas (min/máx/média/mediana/percentis) + ranking top/bottom sobre todas as despesas filtradas. Use para 'quem gastou mais/menos', 'gasto médio/mediano', 'distribuição', 'ranking'",
+  "type": "boolean"
+}

changedInput schema / properties / modo / description

Previous value: -"Agregação ou detalhe (padrão: por-senador)"New value: +"Agregação ou detalhe (padrão: por-senador). Ignorado quando estatisticas=true"

addedInput schema / properties / topN

Added value: +{
+  "default": 10,
+  "description": "Tamanho das listas top/bottom quando estatisticas=true sem agruparPor (padrão: 10, máx: 100)",
+  "maximum": 100,
+  "minimum": 1,
+  "type": "integer"
+}

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

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

A4.2/5.0

Behavior4/5

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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive), and the description adds genuinely non-obvious behaviour: negative lançamentos with no label that flow into sums and surface as min/bottom, plus the truncation aviso. However, it states 'limite cap 100' while the schema allows up to 1000, an inconsistency that could mislead an agent planning page sizes.

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?

Dense but well front-loaded: the negative-values caveat and the estatisticas routing decision come first, followed by the two output branches. Some content (the estatisticas purpose, default values) duplicates the schema descriptions of estatisticas/topN/agruparPor and could be trimmed without loss.

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

Completeness4/5

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

For an 11-parameter tool with an output schema, the description covers the decision logic an agent needs: which mode, when to enable statistics, what the ranking structure looks like, and the truncation signal. The only gap is the overstated limite cap, which conflicts with the structured maximum and could cause an agent to under-request rows.

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 baseline is 3, but the description adds real semantics beyond the schema: the modo/estatisticas interaction ('modo ... Ignorado quando estatisticas=true'), what grupos[0] means under agruparPor, and that free-text filters are partial matches. The 'limite cap 100' claim contradicts the schema's maximum of 1000, which weakens otherwise strong parameter guidance.

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

Purpose4/5

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

Names the specific resource (Despesas da Cota para Exercício da Atividade Parlamentar dos senadores) scoped to a year, so an agent knows exactly what data comes back. It does not explicitly contrast itself with near-neighbours like senado_orcamento_parlamentar or senado_remuneracoes_servidores, but the CEAPS scope is distinctive enough to disambiguate in practice.

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?

Explicit routing: 'para perguntas de maior/menor/média/mediana/distribuição/ranking use estatisticas=true', with a stated reason (aggregate modes only sum, they don't reveal distribution or individual extremes) and concrete example queries. It also specifies the estatisticas-without-agruparPor vs with-agruparPor branches and the default aggregate mode, and points to senado_listar_senadores to obtain codSenador.

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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