近日開札予定の競売物件を一覧取得. List auctions whose opening_date falls within the next N days (default 14, max 90). Sorted ascending. Useful for investment screening / calendar exports.
Part of the 不動産競売 構造化データハブ — Japan real-estate auctions server.
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AI agents call list_upcoming_sales to retrieve information from 不動産競売 構造化データハブ — Japan real-estate auctions without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though list_upcoming_sales only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"list_upcoming_sales": {}
}
}See the full 不動産競売 構造化データハブ — Japan real-estate auctions policy for all 5 tools.
These attack patterns abuse exactly the kind of access list_upcoming_sales gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
近日開札予定の競売物件を一覧取得. List auctions whose opening_date falls within the next N days (default 14, max 90). Sorted ascending. Useful for investment screening / calendar exports.. It is categorised as a Read tool in the 不動産競売 構造化データハブ — Japan real-estate auctions MCP Server, which means it retrieves data without modifying state.
Register the 不動産競売 構造化データハブ — Japan real-estate auctions MCP server in PolicyLayer and add a rule for list_upcoming_sales: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches 不動産競売 構造化データハブ — Japan real-estate auctions. Nothing to install.
list_upcoming_sales is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_upcoming_sales rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for list_upcoming_sales. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
list_upcoming_sales is provided by the 不動産競売 構造化データハブ — Japan real-estate auctions MCP server (https://keibai-hub.com/mcp-auctions). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 5 不動産競売 構造化データハブ — Japan real-estate auctions tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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