Senado BR — Brazilian Federal Senate Open Data

Resultados do plenário

senado_resultado_plenario

Read-onlyIdempotent

Fetch plenary session results for a given date from Brazil's Federal Senate, including agenda items, opinions, and voting outcomes.

Instructions

Resultado das sessões plenárias numa data: itens de pauta apreciados, pareceres e resultados. Retorna { data, escopo, count, sessoes } (todas as sessões da data, sem paginação), com cada sessão trazendo codigoSessao, numeroSessao, data, hora, tipo, casa e itens (codigoMateria, identificacao, ementa, resultado, parecer — resultado/parecer podem vir null em itens ainda não deliberados). Sem sessão na data, count é 0 e sessoes vem vazio. escopo: sf (Senado), cn (Congresso) ou mes (resumo do mês). Para a pauta prévia use senado_agenda_plenario; orientação de bancada via senado_orientacao_bancada.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`data`	Yes	Data da sessão (YYYYMMDD); para escopo=mes, qualquer dia do mês
`escopo`	No	sf = Senado no dia; cn = Congresso no dia; mes = resumo do mês	sf

Output Schema

TableJSON Schema

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

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedv3.18.4Oct 14, 2026

changedOutput schema / properties / provenance / anyOf

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Changed3 schema fields changedv3.15.2Oct 7, 2026

addedOutput schema / properties / attribution

Added value: +{
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+}

addedOutput schema / properties / provenance

Added value: +{
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+          }
+        },
+        "required": [
+          "source",
+          "source_url",
+          "data_vintage",
+          "retrieved_at",
+          "retrieval",
+          "citation",
+          "license"
+        ],
+        "type": "object"
+      },
+      "minItems": 1,
+      "type": "array"
+    }
+  ]
+}

addedOutput schema / required

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

Changed3 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
```

changedOutput schema / $schema

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

Changed2 schema fields changedv3.3.3Jul 6, 2026
- removedInput schema / additionalProperties
```
Removed value: -false
```
- changedOutput schema / additionalProperties
```
Previous value: -trueNew value: +{}
```
First observedv3.3.1Jun 25, 2026

TDQS

A4.6/5.0

Behavior5/5

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

Annotations already declare readOnly/idempotent/non-destructive/openWorld, and the description adds real behavioral context on top: no pagination (all sessions for the date returned), nullable `resultado`/`parecer` for items not yet deliberated, and the empty-result contract (count 0, empty sessoes). That is exactly the extra detail annotations cannot carry.

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?

Single well-structured paragraph: purpose first, then result shape, then edge cases, then routing to siblings. It loses a point for enumerating response fields (`codigoSessao`, `numeroSessao`, `identificacao`, `ementa`, etc.) that the output schema already defines, which is redundant weight.

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?

Given an output schema exists, the description goes beyond the minimum by covering the no-session case and null field semantics, plus the escopo modes and sibling routing. An agent has everything needed to call it correctly and interpret the response.

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

Parameters3/5

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

Schema description coverage is 100%, so the schema already documents both `data` (YYYYMMDD pattern) and the `escopo` enum. The description largely restates those meanings ('sf (Senado), cn (Congresso) ou mes (resumo do mês)') rather than adding syntax or edge-case semantics beyond the schema, so the baseline 3 applies.

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+resource: results of plenary sessions on a given date, including pauta items deliberated, pareceres and outcomes. It explicitly names the sibling it must not be confused with (senado_agenda_plenario for the prior agenda, senado_orientacao_bancada for bench guidance), so an agent can route without opening either 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?

Provides explicit alternatives with the condition that selects them: 'Para a pauta prévia use senado_agenda_plenario; orientação de bancada via senado_orientacao_bancada'. The escopo values are also explained as usage modes (day vs month summary), leaving little to inference.

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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