Senado BR — Brazilian Federal Senate Open Data

Reuniões de comissão

senado_reunioes_comissao

Read-onlyIdempotent

List Brazilian Federal Senate committee meetings by sigla and date range; returns agenda details like time, place, type, and status for up to two weeks.

Instructions

Lista reuniões de uma comissão (pela sigla) num intervalo dataInicio/dataFim (YYYYMMDD); sem datas, usa os últimos 14 dias. Atenção: o upstream devolve a agenda de TODAS as comissões do período (o filtro por sigla é local), então janelas amplas (mensais/anuais) podem estourar o limite de tamanho da resposta (erro de payload): prefira janelas de até 2 semanas e divida períodos maiores em chamadas sucessivas. Retorna { sigla, periodo, count, reunioes }, cada reunião com codigo, descricao, data, hora, local, tipo e situacao. Intervalos entre anos são divididos por ano internamente. Descubra a sigla via senado_listar_comissoes; use o codigo retornado em senado_reuniao_comissao para os detalhes da pauta.

Input Schema

TableJSON Schema

Name	Required	Description
`sigla`	Yes	Sigla da comissão
`dataFim`	No	Data fim (YYYYMMDD)
`dataInicio`	No	Data início (YYYYMMDD)

Output Schema

TableJSON Schema

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

Schema Changelog

Changes observed during successful MCP inspections.

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Changed3 schema fields changedv3.15.2Oct 7, 2026

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addedOutput schema / properties / provenance

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+          "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"
+]

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

A4.8/5.0

Behavior5/5

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 genuinely non-obvious behavior: the upstream returns ALL commissions' agenda for the period and the sigla filter is applied locally, wide windows can trigger a payload-size error, and cross-year intervals are split per year internally. This is exactly the operational context an agent needs to avoid failures.

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?

Front-loaded with purpose, then the critical warning, then return shape, then routing. Every sentence carries operational weight, though the return-field enumeration is slightly redundant given an output schema exists.

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 tool with a known payload-limit hazard, local-filter quirk, and cross-year splitting, the description supplies all the caveats an agent needs to call it safely. The output schema already covers return structure, and the description's mention of it is 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 description coverage is 100%, so the baseline is 3, and the description still adds meaning beyond the schema: the YYYYMMDD semantics are echoed, the default when both dates are omitted (last 14 days) is stated, and `sigla` is tied to its discovery source. The local-filter caveat further explains how `sigla` actually behaves.

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?

The description opens with a precise verb+resource ('Lista reuniões de uma comissão') and immediately scopes it by the `sigla` filter and date interval. It also distinguishes itself from neighbors by naming `senado_listar_comissoes` (to find the sigla) and `senado_reuniao_comissao` (for agenda details), so an agent can route correctly without opening schemas.

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 when-to-use and how-to-use guidance: default behavior when dates are omitted (last 14 days), preferred window size (up to 2 weeks), and the instruction to split larger periods into successive calls. It also states the prerequisite for obtaining the required `sigla` and where to go next for detail.

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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