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UK Parliament MCP Server

by kupad95
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get_events

Retrieve recent UK parliamentary events: divisions with pass/fail results, party rebellions, bill stage changes, or a specific MP's voting record. Filter by house, party, MP name, keywords, or date range.

Instructions

Get recent parliamentary events: votes/divisions, party rebellions, bill stage changes, or a specific MP's voting record. event_type='division': recent votes with pass/fail results. event_type='rebellion': divisions with party rebels, optionally filtered by party. event_type='bill': bills filtered by stage or keyword. event_type='member_votes': full voting history for a specific MP — pass name='Nigel Farage' (or mp_id if already known). Shows each division, how the MP voted (Aye/No), and the result.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
event_typeYesThe type of event to retrieve.
houseNoWhich house. Defaults to Commons for votes.
partyNoFor event_type='rebellion', filter to this party's rebels.
nameNoFor event_type='member_votes': the MP's name (e.g. 'Nigel Farage').
mp_idNoFor event_type='member_votes': the MP's member ID if already known.
daysNoHow many days back to search. Default 30.
limitNoMaximum number of results. Default 20.
stageNoFor event_type='bill': firstreading, secondreading, committee, report, thirdreading, royalassent.
keywordNoFor event_type='bill', search bill titles by keyword.

Implementation Reference

  • src/tools/events.ts:123-160 (handler)
    Main handler for get_events tool. Dispatches to sub-handlers based on event_type: division, rebellion, bill, or member_votes.
    export async function handleEventsTool(
  name: string,
  args: Record<string, unknown>
): Promise<string> {
  try {
    if (name !== "get_events") {
      throw new Error(`Unknown tool: ${name}`);
    }

    const eventType = args.event_type as string;
    const house = (args.house as "Commons" | "Lords") ?? "Commons";
    const days = (args.days as number) ?? 30;
    const limit = (args.limit as number) ?? 20;

    if (eventType === "division") {
      return await handleDivisionEvents(house, days, limit);
    } else if (eventType === "rebellion") {
      const party = args.party as string | undefined;
      return await handleRebellionEvents(house, days, limit, party);
    } else if (eventType === "bill") {
      const stage = args.stage as string | undefined;
      const keyword = args.keyword as string | undefined;
      return await handleBillEvents(house, limit, stage, keyword, args);
    } else if (eventType === "member_votes") {
      const memberName = args.name as string | undefined;
      const mpId = args.mp_id as number | undefined;
      return await handleMemberVotes(memberName, mpId, days, limit);
    } else {
      throw new Error(
        `Unknown event_type: ${eventType}. Use 'division', 'rebellion', 'bill', or 'member_votes'.`
      );
    }
  } catch (error) {
    const message =
      error instanceof Error ? error.message : "An unknown error occurred.";
    throw new Error(message);
  }
}
  • src/tools/events.ts:162-190 (handler)
    Sub-handler for event_type='division': fetches recent divisions and formats pass/fail results.
    async function handleDivisionEvents(
  house: "Commons" | "Lords",
  days: number,
  limit: number
): Promise<string> {
  const startDate = daysAgoISO(days);
  const summaries = await fetchDivisionSummaries(house, startDate, limit);

  if (summaries.length === 0) {
    return `No divisions found in the ${house} in the last ${days} days.`;
  }

  const lines: string[] = [];
  lines.push(`Recent Divisions — ${house} (last ${days} days)`);
  lines.push("");

  for (const div of summaries) {
    const yesLabel = house === "Commons" ? "Ayes" : "Contents";
    const noLabel = house === "Commons" ? "Noes" : "Not Contents";
    const passed = div.yesCount > div.noCount;
    const result = passed ? "PASSED" : "FAILED";
    lines.push(`• [${formatDate(div.date)}] ${div.title}`);
    lines.push(
      `  ID: ${div.id} | ${result} — ${yesLabel}: ${div.yesCount}, ${noLabel}: ${div.noCount}${div.isGovernmentWin !== undefined ? ` | Govt ${div.isGovernmentWin ? "won" : "lost"}` : ""}`
    );
  }

  return lines.join("\n");
}
  • src/tools/events.ts:192-254 (handler)
    Sub-handler for event_type='rebellion': finds divisions with party rebels, optionally filtered by party.
    async function handleRebellionEvents(
  house: "Commons" | "Lords",
  days: number,
  limit: number,
  party?: string
): Promise<string> {
  const startDate = daysAgoISO(days);
  const fetchCount = Math.min(limit * 3, 150);
  const summaries = await fetchDivisionSummaries(house, startDate, fetchCount);

  const details = await batchedFetch(
    summaries,
    (summary: DivisionSummary) => fetchDivisionDetail(house, summary.id)
  );

  const results: { title: string; date: string; id: number; rebels: { name: string; party: string }[] }[] = [];

  for (let i = 0; i < summaries.length; i++) {
    if (results.length >= limit) break;
    const detail = details[i];
    if (!detail) continue;
    const summary = summaries[i];

    let rebels =
      house === "Commons"
        ? detectCommonsRebels(detail as CommonsDivisionDetail)
        : detectLordsRebels(detail as LordsDivisionDetail);

    if (party) {
      const lower = party.toLowerCase();
      rebels = rebels.filter((r) => r.party.toLowerCase().includes(lower));
    }

    if (rebels.length > 0) {
      results.push({
        title: summary.title,
        date: summary.date,
        id: summary.id,
        rebels: rebels.map((r) => ({ name: r.name, party: r.party })),
      });
    }
  }

  if (results.length === 0) {
    return `No divisions with ${party ? `${party} ` : ""}rebels found in the ${house} in the last ${days} days.`;
  }

  const lines: string[] = [];
  lines.push(
    `Divisions with Party Rebels — ${house} (last ${days} days)${party ? ` — ${party} rebels` : ""}`
  );
  lines.push("");

  for (const r of results) {
    lines.push(`• [${formatDate(r.date)}] ${r.title} (ID: ${r.id})`);
    const shown = r.rebels.slice(0, 5);
    lines.push(
      `  Rebels: ${shown.map((rb) => `${rb.name} (${rb.party})`).join(", ")}${r.rebels.length > 5 ? ` +${r.rebels.length - 5} more` : ""}`
    );
  }

  return lines.join("\n");
}
  • src/tools/events.ts:256-399 (handler)
    Sub-handler for event_type='bill': fetches bills filtered by stage/keyword with fallback multi-word search.
    async function handleBillEvents(
  house: "Commons" | "Lords" | undefined,
  limit: number,
  stage?: string,
  keyword?: string,
  args?: Record<string, unknown>
): Promise<string> {
  // Build URL with repeated BillStage params
  let url = `${BILLS_API}/Bills?Session=39&Take=${limit}`;

  if (stage) {
    const stageIds = STAGE_IDS[stage.toLowerCase()];
    if (stageIds) {
      for (const id of stageIds) {
        url += `&BillStage=${id}`;
      }
    }
  }

  if (keyword) {
    url += `&SearchTerm=${encodeURIComponent(keyword)}`;
  }

  if (house === "Commons") {
    url += "&CurrentHouse=1";
  } else if (house === "Lords") {
    url += "&CurrentHouse=2";
  }

  const data = (await parliamentFetch(url)) as BillsResponse;
  let items = data?.items ?? [];

  // Fallback: Bills API SearchTerm only matches short titles. If no results and a
  // keyword was given, search for each significant word individually, then filter
  // the combined candidates by checking all keyword words in short+long title.
  if (items.length === 0 && keyword) {
    const words = keyword.toLowerCase().split(/\s+/).filter((w) => w.length > 3);
    const seen = new Set<number>();
    const candidates: BillItem[] = [];

    // Fetch all word searches in parallel
    const wordUrls = words.map((word) => {
      let wordUrl = `${BILLS_API}/Bills?Session=39&Take=30`;
      if (stage) {
        const stageIds = STAGE_IDS[stage.toLowerCase()];
        if (stageIds) {
          for (const id of stageIds) wordUrl += `&BillStage=${id}`;
        }
      }
      if (house === "Commons") wordUrl += "&CurrentHouse=1";
      else if (house === "Lords") wordUrl += "&CurrentHouse=2";
      wordUrl += `&SearchTerm=${encodeURIComponent(word)}`;
      return wordUrl;
    });

    const wordResults = await Promise.allSettled(
      wordUrls.map((u) => parliamentFetch(u) as Promise<BillsResponse>)
    );
    for (const res of wordResults) {
      if (res.status === "fulfilled") {
        for (const bill of res.value?.items ?? []) {
          if (!seen.has(bill.billId)) {
            seen.add(bill.billId);
            candidates.push(bill);
          }
        }
      }
    }

    const keywordWords = keyword.toLowerCase().split(/\s+/);
    type BillMatch = { bill: BillItem; detail: { sponsor: string; longTitle: string | null } };

    // Fetch all bill details in parallel
    const candidateSlice = candidates.slice(0, 30);
    const detailResults = await batchedFetch(
      candidateSlice,
      (bill: BillItem) => fetchBillDetail(bill.billId)
    );

    const matching: BillMatch[] = [];
    for (let i = 0; i < candidateSlice.length; i++) {
      const detail = detailResults[i];
      if (!detail) continue;
      const bill = candidateSlice[i];
      const combined = (bill.shortTitle + " " + (detail.longTitle ?? "")).toLowerCase();
      if (keywordWords.every((w) => combined.includes(w))) {
        matching.push({ bill, detail });
      }
    }

    if (matching.length === 0) {
      return `No bills found matching "${keyword}".`;
    }

    const lines: string[] = [];
    lines.push(`Bills matching "${keyword}": ${matching.length} found`);
    lines.push("");
    for (const { bill, detail } of matching) {
      const stageDesc = bill.currentStage?.description ?? "Unknown Stage";
      lines.push(`• ${bill.shortTitle} (ID: ${bill.billId})`);
      lines.push(
        `  Stage: ${stageDesc} | House: ${bill.currentHouse} | Last updated: ${formatDate(bill.lastUpdate)} | Lead sponsor: ${detail.sponsor}`
      );
      if (detail.longTitle) lines.push(`  Long title: ${detail.longTitle}`);
    }
    return lines.join("\n");
  }

  if (items.length === 0) {
    return `No bills found matching the specified criteria.`;
  }

  const lines: string[] = [];
  lines.push(
    `Bills${stage ? ` — ${stage}` : ""}${keyword ? ` matching "${keyword}"` : ""}${house ? ` in the ${house}` : ""}`
  );
  lines.push("");

  const billDetails = await batchedFetch(
    items,
    (bill: BillItem) => fetchBillDetail(bill.billId)
  );

  for (let i = 0; i < items.length; i++) {
    const bill = items[i];
    const detail = billDetails[i];
    const stageDesc = bill.currentStage?.description ?? "Unknown Stage";
    const currentHouse = bill.currentHouse ?? "Unknown";
    const lastUpdated = formatDate(bill.lastUpdate);

    lines.push(`• ${bill.shortTitle} (ID: ${bill.billId})`);
    lines.push(
      `  Stage: ${stageDesc} | House: ${currentHouse} | Last updated: ${lastUpdated} | Lead sponsor: ${detail?.sponsor ?? "Unknown"}`
    );
    if (detail?.longTitle) {
      lines.push(`  Long title: ${detail.longTitle}`);
    }
  }

  lines.push("");
  lines.push(`Total matching: ${data.totalResults ?? items.length}`);

  return lines.join("\n");
}
  • src/tools/events.ts:426-513 (handler)
    Sub-handler for event_type='member_votes': fetches full voting history for a specific MP, showing Aye/No per division.
    async function handleMemberVotes(
  memberName: string | undefined,
  mpId: number | undefined,
  days: number,
  limit: number
): Promise<string> {
  if (!memberName && !mpId) {
    throw new Error("Provide name or mp_id for event_type='member_votes'.");
  }

  // Resolve name → ID if needed
  let memberId = mpId;
  let displayName = memberName ?? `MP ${mpId}`;
  let party = "";
  let constituency = "";

  if (!memberId) {
    const data = (await parliamentFetch(`${MEMBERS_API}/Members/Search`, {
      Name: memberName,
      Take: 1,
    })) as MemberSearchResponse;
    const member = data?.items?.[0]?.value;
    if (!member) {
      return `No MP found matching "${memberName}".`;
    }
    memberId = member.id;
    displayName = member.nameDisplayAs;
    party = member.latestParty?.name ?? "";
    constituency = member.latestHouseMembership?.membershipFrom ?? "";
  }

  const startDate = daysAgoISO(days);
  const pageSize = 25;
  const summaries: MemberVoteDivision[] = [];
  let skip = 0;

  while (summaries.length < limit) {
    const take = Math.min(pageSize, limit - summaries.length);
    const data = (await parliamentFetch(
      `${COMMONS_VOTES_API}/divisions.json/search`,
      {
        "queryParameters.memberId": memberId,
        "queryParameters.startDate": startDate,
        "queryParameters.take": take,
        "queryParameters.skip": skip,
      }
    )) as MemberVoteDivision[];

    const items = Array.isArray(data) ? data : [];
    summaries.push(...items);
    if (items.length < take) break;
    skip += take;
  }

  if (summaries.length === 0) {
    return `No recorded votes found for ${displayName} in the last ${days} days.`;
  }

  // The search endpoint returns empty Ayes/Noes arrays — fetch each division
  // detail to determine how the member actually voted (Aye or No).
  const details = await batchedFetch(
    summaries,
    (div: MemberVoteDivision) =>
      parliamentFetch(`${COMMONS_VOTES_API}/division/${div.DivisionId}.json`) as Promise<MemberVoteDivision>
  );

  const lines: string[] = [];
  lines.push(
    `Voting record — ${displayName}${party ? ` (${party}` : ""}${constituency ? `, ${constituency}` : ""}${party ? ")" : ""} | Last ${days} days`
  );
  lines.push(`Divisions: ${summaries.length}`);
  lines.push("");

  for (let i = 0; i < summaries.length; i++) {
    const summary = summaries[i];
    const detail = details[i];
    const votedAye = detail?.Ayes?.some((v) => v.MemberId === memberId);
    const votedNo = detail?.Noes?.some((v) => v.MemberId === memberId);
    const vote = votedAye ? "AYE" : votedNo ? "NO" : "NOT RECORDED";
    const passed = summary.AyeCount > summary.NoCount ? "PASSED" : "FAILED";
    lines.push(`• [${formatDate(summary.Date)}] ${summary.Title}`);
    lines.push(
      `  Voted: ${vote} | Result: ${passed} (Ayes: ${summary.AyeCount}, Noes: ${summary.NoCount}) | ID: ${summary.DivisionId}`
    );
  }

  return lines.join("\n");
}
  • src/tools/events.ts:20-74 (schema)
    Tool definition and input schema for get_events. Defines the four event types (division, rebellion, bill, member_votes) and all optional parameters.
    export const eventsTools = [
  {
    name: "get_events",
    description:
      "Get recent parliamentary events: votes/divisions, party rebellions, bill stage changes, or a specific MP's voting record. " +
      "event_type='division': recent votes with pass/fail results. " +
      "event_type='rebellion': divisions with party rebels, optionally filtered by party. " +
      "event_type='bill': bills filtered by stage or keyword. " +
      "event_type='member_votes': full voting history for a specific MP — pass name='Nigel Farage' (or mp_id if already known). Shows each division, how the MP voted (Aye/No), and the result.",
    inputSchema: {
      type: "object",
      properties: {
        event_type: {
          type: "string",
          enum: ["division", "rebellion", "bill", "member_votes"],
          description: "The type of event to retrieve.",
        },
        house: {
          type: "string",
          enum: ["Commons", "Lords"],
          description: "Which house. Defaults to Commons for votes.",
        },
        party: {
          type: "string",
          description: "For event_type='rebellion', filter to this party's rebels.",
        },
        name: {
          type: "string",
          description: "For event_type='member_votes': the MP's name (e.g. 'Nigel Farage').",
        },
        mp_id: {
          type: "number",
          description: "For event_type='member_votes': the MP's member ID if already known.",
        },
        days: {
          type: "number",
          description: "How many days back to search. Default 30.",
        },
        limit: {
          type: "number",
          description: "Maximum number of results. Default 20.",
        },
        stage: {
          type: "string",
          description: "For event_type='bill': firstreading, secondreading, committee, report, thirdreading, royalassent.",
        },
        keyword: {
          type: "string",
          description: "For event_type='bill', search bill titles by keyword.",
        },
      },
      required: ["event_type"],
    },
  },
];
  • src/index.ts:36-36 (registration)
    Registration of get_events in the MCP CallToolRequestSchema handler: routes the call to handleEventsTool.
    else if (name === "get_events") result = await handleEventsTool(name, safeArgs);

Tool Definition Quality

A4.1/5.0
Behavior3/5

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

With no annotations, the description carries the burden and explains what each event_type returns (e.g., pass/fail results, rebellions, bill stages, MP voting history). It does not cover performance, rate limits, side effects, or error conditions.

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 a single paragraph but well-organized by event_type, each with a brief explanation. It is concise yet informative, though some repetition could be trimmed.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a tool with 9 parameters and no output schema, the description adequately covers the main use cases for each event_type. However, it lacks details on error handling, pagination, or rate limits.

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?

The input schema has 100% coverage, but the description adds context beyond schema by explaining how to use parameters for each event_type, clarifying defaults (days=30, limit=20, house='Commons'), and providing usage examples.

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 clearly states it retrieves recent parliamentary events and lists four specific event types (divisions, rebellions, bills, member votes) with examples, distinguishing between them effectively.

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?

The description provides clear guidance on when to use each event_type, including example parameters like 'name='Nigel Farage'' for member_votes. However, it does not mention when not to use this tool or suggest alternative tools.

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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