Senado BR — Brazilian Federal Senate Open Data

Listar contratações

senado_contratacoes_lista

Read-onlyIdempotent

List Brazilian Federal Senate procurement records—price registers, commitment notes, or minor apprentices—by type, with optional text filters and pagination.

Instructions

Lista, conforme tipo, atas de registro de preço, notas de empenho ou menores aprendizes do Senado, com filtro textual opcional aplicado no Worker sobre todos os campos. Retorna { tipo, count, total, registros }; para atas_registro_preco/notas_empenho cada registro segue o formato de contrato (id, numero, objeto, empresa, subEspecie, vigencia...), enquanto menores_aprendizes vêm como registros brutos da API (campos não normalizados). Ordenação por ordem sobre a sequência de id do upstream: desc (padrão) = mais recentes primeiro, asc = mais antigos primeiro; offset pula registros para paginar a cauda. Limitado a limite (padrão 50, máx 500), com aviso ao truncar; tipo sem registros retorna lista vazia. Para aprofundar uma ata/empenho, use o id em senado_contratacao_detalhe.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`tipo`	Yes	Qual lista consultar
`ordem`	No	desc = mais recentes primeiro (padrão); asc = mais antigos primeiro (ordem de id do upstream)	desc
`filtro`	No	Filtro textual (empresa, objeto, etc.)
`limite`	No	Máximo de resultados (padrão: 50)
`offset`	No	Registros a pular após a ordenação (paginação; padrão: 0)

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

Previous value: -[
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-]New value: +[
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Changed3 schema fields changedv3.15.2Oct 7, 2026

addedOutput schema / properties / attribution

Added value: +{
+  "items": {
+    "type": "string"
+  },
+  "type": "array"
+}

addedOutput schema / properties / provenance

Added value: +{
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+        },
+        "data_vintage": {
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+          ]
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+            "properties": {
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+              "dataset_id": {
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+              "fields": {
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+              "retrieved_at": {
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+                ]
+              },
+              "served_from_cache": {
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+                ]
+              },
+              "source_url": {
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+            "required": [
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+          "type": "array"
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+        "license": {
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+        "retrieval": {
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+                      },
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+                "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"
+]

Changed5 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
```

addedInput schema / properties / offset

Added value: +{
+  "default": 0,
+  "description": "Registros a pular após a ordenação (paginação; padrão: 0)",
+  "maximum": 9007199254740991,
+  "minimum": 0,
+  "type": "integer"
+}

addedInput schema / properties / ordem

Added value: +{
+  "default": "desc",
+  "description": "desc = mais recentes primeiro (padrão); asc = mais antigos primeiro (ordem de id do upstream)",
+  "enum": [
+    "asc",
+    "desc"
+  ],
+  "type": "string"
+}

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, but the description adds substantial behavior beyond them: the filter is applied in the Worker over all fields, records differ in shape per `tipo` (normalized contract format for atas/empenhos vs raw API fields for menores aprendizes), truncation emits an `aviso`, and an empty `tipo` returns an empty list. This is rich, non-obvious operational context.

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 description is front-loaded with purpose and type enumeration, then layers return shape, ordering, pagination, and routing in a logical order. It is slightly verbose because it re-states `ordem`, `limite`, and `offset` semantics already present in the 100%-covered schema, but every other sentence carries distinct value.

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 multiplexed list tool with three `tipo` values, an output schema, and rich annotations, the description covers all the essentials: what each type returns, field-shape differences, ordering, pagination, truncation behavior, empty-result behavior, and where to go for details. Nothing needed to call the tool correctly appears to be 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 coverage is 100%, so the baseline is 3. The description adds meaning beyond the schema by specifying that `filtro` is applied in the Worker over all fields, that `offset` paginates the tail after sorting, and that truncation at `limite` produces an `aviso`. These details go past the per-field schema descriptions, though `ordem` and `limite` semantics are largely restated from the schema.

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 names a specific verb and resource ('Lista... atas de registro de preço, notas de empenho ou menores aprendizes') and enumerates the three data types, making it distinguishable from sibling tools. It also explicitly routes to the sibling `senado_contratacao_detalhe` for depth, so an agent can tell what this tool does versus its nearest alternative 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 Guidelines4/5

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

It clearly states the context of use (list one of three collections, optional textual filter, pagination via offset) and names the alternative for drill-down (`senado_contratacao_detalhe`). However, it gives no explicit exclusions or guidance relative to other listing siblings such as `senado_contratos` or `senado_licitacoes`, so the when-not-to-use side is inferred rather than stated.

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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