houan-mcp
@codeagentjp/houan-mcp
Servidor MCP local stdio para buscar proyectos de ley de la Dieta (衆参議案情報) y registros de preguntas y respuestas de comités japoneses a través de la API de NDL Kokkai (国会会議録検索システム).
Este servidor no llama a un LLM. Solo devuelve datos de la Dieta respaldados por fuentes, con URLs primarias (NDL Kokkai, 衆議院議案情報, 参議院議案情報) para que su cliente MCP (Claude Desktop, Claude Code, Cursor o cualquier otro agente) pueda citar la fuente original.
Paquete hermano: @codeagentjp/egov-law-mcp para leyes japonesas actuales (Búsqueda de leyes e-Gov). houan-mcp cubre el lado del proceso legislativo: proyectos de ley en deliberación, interrogatorios de comités y transcripciones completas de reuniones.
Estado
MVP. Cuatro herramientas:
find_diet_qa— búsqueda de texto completo en todos los discursos de los comités de la Dieta a través de la API NDL Kokkai. Filtrar por fecha, cámara, comité, orador.get_meeting_record— recuperar la transcripción completa de un solo comité porissueID.search_bills— buscar proyectos de ley de la sesión actual en cualquiera de las cámaras por palabra clave del título.get_bill— recuperar detalles de un proyecto de ley (cronología de procedimientos, asignación de comité, URL de texto completo).
Related MCP server: open-assembly-mcp
Requisitos
Node.js 20 o posterior
Acceso a la red a
https://kokkai.ndl.go.jp,https://www.shugiin.go.jp,https://www.sangiin.go.jp
Instalación
Desde npm:
{
"mcpServers": {
"houan": {
"command": "npx",
"args": ["-y", "@codeagentjp/houan-mcp"]
}
}
}Desde el código fuente:
git clone https://github.com/SHAYOUWORLD/houan-mcp.git
cd houan-mcp
node bin/houan-mcp.mjs{
"mcpServers": {
"houan": {
"command": "node",
"args": ["/absolute/path/to/houan-mcp/bin/houan-mcp.mjs"]
}
}
}Herramientas
find_diet_qa
Búsqueda de texto completo de discursos de comités de la Dieta a través de la API NDL Kokkai.
{
"keyword": "クロード ミトス",
"from": "2026-04-01",
"until": "2026-04-25",
"chamber": "衆議院",
"committee": "外務委員会",
"limit": 5
}Devuelve los discursos encontrados con el orador, cargo, contexto del comité y URL directa de NDL.
get_meeting_record
Recuperar una transcripción completa única por issueID.
{
"issueID": "122103968X00620260410"
}search_bills
Buscar 衆議院議案情報 / 参議院議案情報 por palabra clave del título.
{
"keyword": "情報",
"chamber": "both",
"session": 221,
"limit": 20
}get_bill
Recuperar una página de detalles de un proyecto de ley (cronología de procedimientos, asignación de comité, URL de texto completo). La proceedingURL debe ser una URL devuelta por search_bills; se valida contra el prefijo de ruta permitido de la cámara antes de realizar la obtención.
{
"chamber": "shugiin",
"proceedingURL": "https://www.shugiin.go.jp/internet/itdb_gian.nsf/html/gian/keika/1DE..."
}Fuentes de datos y atribución
Este paquete utiliza tres fuentes públicas japonesas:
NDL Kokkai (国会会議録検索システム) — https://kokkai.ndl.go.jp/ · Documentación de la API. Registros de la Dieta publicados desde 1947. No se requiere autenticación. Sea un buen vecino: inserte breves retrasos entre solicitudes secuenciales, evite ráfagas concurrentes.
衆議院議案情報 — https://www.shugiin.go.jp/internet/itdb_gian.nsf/html/gian/menu.htm
参議院議案情報 — https://www.sangiin.go.jp/japanese/joho1/kousei/gian/index.htm
Los resultados de las herramientas incluyen la URL de la fuente. Cuando publique o redistribuya resultados basados en este paquete, incluya una atribución adecuada. Sugerencia:
出典: 国会会議録検索システム (https://kokkai.ndl.go.jp/) / 衆議院議案情報 / 参議院議案情報
Ejemplo: extrayendo una sesión de preguntas y respuestas sobre Mythos
El interrogatorio del 10/04/2026 en el Comité de Asuntos Exteriores de la Cámara de Representantes (衆議院外務委員会) por parte de 宇佐美登 (Equipo Mirai) sobre la vista previa de Claude Mythos de Anthropic se puede recuperar así:
{
"tool": "find_diet_qa",
"arguments": {
"keyword": "クロード",
"from": "2026-04-01",
"until": "2026-04-30"
}
}La respuesta incluye la respuesta textual de 花田貴裕 (funcionario del gobierno) con la meetingURL apuntando al registro canónico de NDL en https://kokkai.ndl.go.jp/txt/122103968X00620260410.
Notas de seguridad
Este paquete es una herramienta de referencia legislativa, no un consejo legal o político.
No ejecuta comandos de shell.
Solo escribe mensajes JSON-RPC en stdout y registra solo en stderr.
Solo obtiene datos de la API NDL Kokkai y los endpoints de 衆/参 議案情報.
Los registros de la Dieta en NDL suelen aparecer con un retraso de 1 a 2 semanas después de la reunión del comité. Si no se puede encontrar una reunión reciente, vuelva a consultar más tarde o consulte directamente la biblioteca de videos de la cámara.
Relacionado
MCP hermano para leyes actuales:
@codeagentjp/egov-law-mcpHoja de ruta (法令diff / 自治体条例 / 判例 MCPs): SHAYOUWORLD/egov-law-mcp#1
Artículo de fondo: codeagent.jp / Tools
Licencia
MIT © codeagent.jp
Available Tools
4 toolsfind_diet_qaA
Full-text search of Japanese Diet committee speeches via the NDL Kokkai API. Returns speeches matching the keyword along with speaker, position, committee, and the canonical NDL URL.
| Name | Required | Description | Default |
|---|---|---|---|
| keyword | Yes | Full-text query. Spaces are AND. | |
| from | No | Date range start, YYYY-MM-DD. | |
| until | No | Date range end, YYYY-MM-DD. | |
| chamber | No | Chamber filter. | |
| committee | No | Committee name, e.g. 外務委員会. Spaces are OR. | |
| speaker | No | Speaker name. | |
| limit | No | Maximum number of results. Defaults to 10. |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description must disclose behavior. It notes the return fields but omits details about sorting, pagination, error handling, or rate limits. The read-only nature is implicit but not explicitly stated.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single, clear sentence that conveys the tool's purpose and key details without any extraneous information.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given 7 parameters and no output schema or annotations, the description covers the basics but lacks details on result ordering, default limit behavior, and error scenarios. It is functional but not comprehensive.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
The input schema already has 100% parameter description coverage, so the description adds no additional semantics beyond listing return fields. Baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states it performs a full-text search of Japanese Diet committee speeches via a specific API, and returns speeches with speaker, position, committee, and URL. This distinguishes it from sibling tools that handle bills and meeting records.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies this tool is for keyword searches within speeches, which is distinct from siblings (get_bill, get_meeting_record, search_bills). However, it does not explicitly state when not to use it or provide alternative guidance.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_billA
Retrieve detail of one bill by chamber and proceedings URL. Returns title, submitter, committee assignment, and a status timeline parsed from the proceedings page. The proceedingURL must be a URL returned by search_bills.
| Name | Required | Description | Default |
|---|---|---|---|
| chamber | Yes | Chamber the bill is registered with. | |
| proceedingURL | Yes | Proceedings URL returned by search_bills. |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description carries full burden. It describes a read-only retrieval operation without mentioning side effects, permissions, or error cases. Adequate but no extra context beyond the read nature.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is two sentences, front-loaded with the action and result. Every sentence adds value without redundancy.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Without an output schema, the description explains what is returned (title, submitter, committee assignment, status timeline). It does not detail the structure of the timeline, but it is reasonably complete for a simple retrieval tool.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema description coverage is 100%, so schema already documents parameters. The description adds the important constraint that proceedingURL must come from search_bills, providing context beyond the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states the tool retrieves detail of one bill using chamber and proceedings URL, and specifies the returned fields (title, submitter, committee assignment, status timeline). It distinguishes itself from sibling tool search_bills which likely returns a list.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description explicitly states that proceedingURL must be a URL returned by search_bills, guiding the agent to use search_bills first. No explicit when-not-to-use, but the constraint is clear.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
get_meeting_recordA
Retrieve the full transcript of one Diet committee meeting by issueID via the NDL Kokkai API. Use the issueID from a find_diet_qa result.
| Name | Required | Description | Default |
|---|---|---|---|
| issueID | Yes | Meeting issueID, e.g. 122103968X00620260410. |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description bears full responsibility. It states 'retrieve', indicating a read operation, but does not disclose potential behavior like error handling, rate limits, or output format. It's minimally adequate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
Two sentences with no redundancy. First sentence front-loads the purpose, second adds usage guidance. Every word earns its place.
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given the tool's simplicity (1 param, no output schema), the description covers all essential aspects: what it retrieves, how to use it, and the source of the parameter. It is complete for its complexity.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Schema coverage is 100% with a description for issueID. The description adds context by saying it comes from find_diet_qa, which is helpful but does not significantly augment the schema. Baseline 3 is appropriate.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states it retrieves the full transcript of a Diet committee meeting using issueID via a specific API, distinguishing it from sibling tools like find_diet_qa (for searching) and get_bill/search_bills (for bills).
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description explicitly says to use the issueID from find_diet_qa, providing direct guidance on prerequisite. It implies this tool is for retrieval after obtaining the ID, but does not explicitly mention when not to use it or list alternative tools.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
search_billsA
Search current-session Japanese Diet bills (衆議院議案情報 / 参議院議案情報) by title keyword. Returns bill metadata with proceedings and full-text URLs.
| Name | Required | Description | Default |
|---|---|---|---|
| keyword | Yes | Keyword to match in bill title. | |
| chamber | No | Which chamber to search. Defaults to both. | |
| session | No | Diet session number. Defaults to 221. | |
| limit | No | Maximum number of results. Defaults to 30. |
TDQS
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the burden of disclosing behavior. It describes a read-only search operation returning metadata, but lacks details on rate limits, authentication, pagination, or sorting behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.
Is the description appropriately sized, front-loaded, and free of redundancy?
The description is a single efficient sentence that front-loads the tool's action. It avoids unnecessary words, but might benefit from slight structuring (e.g., listing return items).
Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.
Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?
Given no output schema and 4 parameters, the description is short. It mentions return types (metadata, proceedings, URLs) but does not explain defaults or result interpretation, leaving some context gaps for a new user.
Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.
Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?
Input schema has 100% description coverage, so parameters are already well-documented. The description adds minimal extra meaning beyond stating the search is by title keyword, which is already implied by the schema.
Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.
Does the description clearly state what the tool does and how it differs from similar tools?
The description clearly states it searches Japanese Diet bills by title keyword and returns metadata with URLs. It uses a specific verb (search) and resource (bills), and distinguishes from siblings that retrieve specific bills or meeting records.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.
Does the description explain when to use this tool, when not to, or what alternatives exist?
The description implies usage for searching bills by keyword, but does not explicitly state when to use this tool versus alternatives like get_bill or find_diet_qa, nor does it mention when not to use it.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Tool Schema Changelog
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
4 tool updates
v1.0.0- First observed
find_diet_qa - First observed
get_bill - First observed
get_meeting_record - First observed
search_bills
TDQS
Scored across 4 tools
Each tool targets a distinct resource: speeches (find_diet_qa), bills (get_bill, search_bills), and meeting transcripts (get_meeting_record). There is no overlap in functionality, making it easy for an agent to choose the correct tool.
Tool names mix verb prefixes: 'find', 'get', and 'search'. While all use snake_case, the lack of a uniform verb-noun pattern (e.g., all 'get_...' or all 'search_...') creates mild inconsistency.
Four tools is well-scoped for the domain of Japanese Diet information retrieval. Each tool serves a clear purpose without redundancy or excessive granularity.
The tool set covers search and retrieval for bills, speeches, and meeting transcripts, which are the core needs. Minor gaps exist (e.g., listing all committees or filtering by date), but they don't hinder primary workflows.
Maintenance
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