Senado BR — Brazilian Federal Senate Open Data

Ranking de autoria/relatoria por comissão

senado_distribuicao_materias

Read-onlyIdempotent

Rank senators by how many legislative matters they authored or reported in a committee to measure workload; returns counts and member details.

Instructions

Ranqueia parlamentares pela quantidade de matérias numa comissão (siglaComissao), medindo carga de trabalho legislativo. tipo escolhe o eixo: autoria (matérias de autoria; padrão) ou relatoria (matérias relatadas). Retorna { siglaComissao, tipo, count, parlamentares } ordenado por quantidade desc, sem paginação (count 0 quando a comissão não tem registros), cada item com codigo, nome, partido, uf e quantidade. codigoParlamentar restringe a um parlamentar e só tem efeito em tipo=autoria (ignorado em relatoria). Descubra a sigla via senado_listar_comissoes; use o codigo do parlamentar em senado_obter_senador. Para a lista das matérias em si (não a contagem) use senado_buscar_materias.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`tipo`	No	autoria = matérias de autoria por parlamentar (padrão); relatoria = matérias relatadas	autoria
`siglaComissao`	Yes	Sigla da comissão (ex: CCJ, CAE)
`codigoParlamentar`	No	Restringe a um parlamentar — efetivo apenas em tipo=autoria (ignorado em relatoria)

Output Schema

TableJSON Schema

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

Schema Changelog

Changes observed during successful MCP inspections.

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+          },
+          "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"
+]

Changed4 schema fields changedv3.9.0Sep 24, 2026

changedInput schema / $schema

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

addedInput schema / additionalProperties
```
Added value: +false
```

changedInput schema / properties / codigoParlamentar / description

Previous value: -"Filtrar por parlamentar (apenas tipo=autoria)"New value: +"Restringe a um parlamentar — efetivo apenas em tipo=autoria (ignorado em relatoria)"

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 changedv3.3.3Jul 6, 2026
- removedInput schema / additionalProperties
```
Removed value: -false
```
- addedInput schema / properties / codigoParlamentar / maximum
```
Added value: +9007199254740991
```
- addedInput schema / properties / codigoParlamentar / minimum
```
Added value: +-9007199254740991
```
- changedOutput schema / additionalProperties
```
Previous value: -trueNew value: +{}
```
First observedv3.3.1Jun 25, 2026

TDQS

A4.6/5.0

Behavior4/5

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

Annotations cover the safety profile (readOnly, idempotent, non-destructive, openWorld), and the description adds real behavioral context beyond them: no pagination, descending sort by `quantidade`, `count` = 0 for a committee with no records, and the conditional no-op of `codigoParlamentar`. It stops short of anything about rate limits or failure modes, so not a 5.

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 paragraph but front-loaded: purpose first, then return shape, then the parameter caveat, then sibling routing. Every sentence carries information; it is slightly packed into one block rather than broken into steps, keeping it from a 5.

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 3-parameter ranking tool with an output schema, the description covers purpose, return shape, sort order, empty-result behavior, parameter interaction, and sibling alternatives. Nothing an agent needs to call it correctly is missing.

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 description coverage is already 100%, so the baseline is 3. The description goes beyond restating fields by explaining the interaction of `tipo` and `codigoParlamentar` (the filter is silently ignored under relatoria) and naming the ordering field `quantidade`, which is the key semantic an agent needs.

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 ('Ranqueia parlamentares pela quantidade de matérias numa comissão') plus the axis distinction (autoria vs relatoria). An agent can separate this from senado_buscar_materias (raw lists) and senado_obter_senador without opening a schema.

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: discover the sigla via `senado_listar_comissoes`, get the parlamentar `codigo` via `senado_obter_senador`, and use `senado_buscar_materias` when the actual list rather than counts is wanted. It also warns upfront that `codigoParlamentar` is ignored for relatoria, which prevents a wrong invocation.

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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