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Japan Real Estate Transaction Prices (MLIT)

by mk-career-planning · remote · no sign-in to list tools · v0.1.0 · published by GitHub user mk-career-planning

What real estate transaction prices has MLIT published for this Japanese municipality? As published.

Final · 1Changes · 1
CompareRegistry entry

4 tools: 1 do something that can't be undone, 1 change things and 2 only read.

Scanned Oct 21, 2026

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http jp-real-estate https://jp-real-estate-production.mk-career-planning.workers.dev/mcp

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnrealestate_prices_by_municipality

    The server marks "realestate_prices_by_municipality" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

    Matched text

    annotations: {"readOnlyHint":true,"idempotentHint":true,"openWorldHint":true}; The input addresses people (input.to): what it sends cannot be taken back.

    What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

4 tools

Can't be undone 1Claude Code: ask
  • realestate_prices_by_municipalityWhat real estate transaction and contract prices has MLIT (Japan) published for this municipality and quarter?1 finding

    Why it is in this group

    • The input addresses people (input.to): what it sends cannot be taken back.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    Findings

    • Warn

      The server marks "realestate_prices_by_municipality" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

      Matched text

      annotations: {"readOnlyHint":true,"idempotentHint":true,"openWorldHint":true}; The input addresses people (input.to): what it sends cannot be taken back.

      What this check looks for
    Description, as the server wrote it
    What real estate transaction and contract prices has MLIT (Japan) published for this municipality and quarter? Give a 5-digit municipality code and up to 8 quarters (YYYY-Qn). Per quarter and per classification (never pooled): records_published, no_records_published or unknown with a reason, record counts, min/median/max computed by us (null below 5 values), and a capped sample of records as published. Carries the required MLIT credit. Statistics as published; not an appraisal or advice.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
    • idempotentHint: true
Changes things 1Claude Code: ask
  • realestate_municipalitiesWhich municipality codes and names does MLIT's Real Estate Information Library list for this Japanese prefecture?No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    Which municipality codes and names does MLIT's Real Estate Information Library list for this Japanese prefecture? Give a prefecture code (01-47) or name. Returns the 5-digit municipality codes with Japanese and English names as published by MLIT (XIT002): the join key for realestate_prices_by_municipality and other Japanese public data. Carries the required MLIT credit.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
    • idempotentHint: true
Only reads 2Claude Code: allow
  • catalogList the tools of this server with prices, data sources, licensing, daily limits and data freshness.No findings

    Why it is in this group

    • The description's first verb is "list": a word for reading.
    Description, as the server wrote it
    List the tools of this server with prices, data sources, licensing, daily limits and data freshness.

    Annotations the server declares

    • readOnlyHint: true
  • get_receiptRe-fetch the stored result of a settled paid call by its receipt_id, for when the response was lost after payment.No findings

    Why it is in this group

    • The name "get_receipt" says "get": a word for reading.
    Description, as the server wrote it
    Re-fetch the stored result of a settled paid call by its receipt_id, for when the response was lost after payment. Free. Unknown or unsettled receipt ids return RECEIPT_NOT_FOUND. Results are kept for 90 days after settlement.

    Annotations the server declares

    • readOnlyHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.1.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http jp-real-estate https://jp-real-estate-production.mk-career-planning.workers.dev/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__jp-real-estate__catalog",
      "mcp__jp-real-estate__get_receipt"
    ],
    "ask": [
      "mcp__jp-real-estate__realestate_prices_by_municipality",
      "mcp__jp-real-estate__realestate_municipalities"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as jp-real-estate. Review it before you use it.