Senado BR — Brazilian Federal Senate Open Data

Sessões do plenário

senado_encontro_plenario

Read-onlyIdempotent

Retrieve details, agenda, voting results, or summary for a Brazilian Federal Senate plenary session by session code. Use it to inspect what was discussed or decided in a specific legislative meeting.

Instructions

Detalhes de um encontro legislativo (sessão de plenário). Retorna { codigo, secao, encontro }, onde encontro é o objeto bruto da API (ou array, quando o upstream traz vários) cujos campos variam conforme a secao escolhida: detalhes (padrão) traz dados gerais da sessão (tipo, data, situação, presença); pauta traz as matérias previstas; resultado traz os itens apreciados e seus resultados; resumo traz uma síntese. encontro pode vir vazio se a seção não tiver dados, e a chamada retorna erro se o codigo não existir. Obtenha o codigo via senado_agenda_plenario ou senado_resultado_plenario.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`secao`	No	Qual seção do encontro consultar	detalhes
`codigo`	Yes	Código do encontro/sessão

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"

Changed3 schema fields changedv3.3.3Jul 6, 2026
- removedInput schema / additionalProperties
```
Removed value: -false
```
- addedInput schema / properties / codigo / maximum
```
Added value: +9007199254740991
```
- changedOutput schema / additionalProperties
```
Previous value: -trueNew value: +{}
```
First observedv3.3.1Jun 25, 2026

TDQS

A4.5/5.0

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, openWorld), but the description adds real behavioral context: the `encontro` payload may be an object or an array depending on upstream, may come back empty for a section with no data, and the call errors out if `codigo` does not exist. Auth, rate limits, and pagination behavior are still unstated.

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 core purpose is front-loaded in the first clause, and the section-by-section enumeration is information-dense rather than filler. It is a single long paragraph with heavy parenthetical load, so it is dense but each clause carries meaning.

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 two-parameter read tool with full schema coverage, annotations, and an output schema, nothing needed to invoke it correctly is missing: purpose, prerequisite sourcing of `codigo`, section semantics, and failure/empty-case behavior are all covered.

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

Parameters5/5

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

Schema coverage is 100%, so the baseline would be 3, but the description actively enriches the enum beyond the schema's terse 'Qual seção do encontro consultar': detalhes yields type/date/status/attendance, pauta yields scheduled matters, resultado yields deliberated items and outcomes, resumo yields a synthesis. It also explains the integer `codigo` as the meeting identifier sourced from sibling tools.

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 ('Detalhes de um encontro legislativo (sessão de plenário)') and immediately qualifies the scope by section. It also names the two sibling tools that produce the required `codigo`, so an agent can distinguish it from senado_agenda_plenario and senado_resultado_plenario without opening any schema.

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

Usage Guidelines4/5

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

Explicitly tells the agent how to obtain the required `codigo` ('Obtenha o `codigo` via `senado_agenda_plenario` ou `senado_resultado_plenario`'), which is genuine prerequisite guidance. It stops short of an explicit when-not statement or a rule for choosing between the four sections beyond their content descriptions.

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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