法令の改正履歴を取得する。e-Gov v2 /law_revisions を使用。各改正の公布日・施行日・改正法令番号・状態（現行/旧法/未施行）等を返す。
AI agents call get_law_revisions to retrieve information from Houki e-Gov MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves historical information about Japanese law revisions from the e-Gov API v2. It retrieves structured data (dates, statuses, numbers) without side effects, making it a pure Read operation. There is no possibility of modifying laws, deleting data, or triggering external processes.
From the tool's definition Tool name 'get_law_revisions' and description 'retrieve amendment/revision history of laws' (法令の改正履歴を取得する). Returns read-only metadata: proclamation dates, effective dates, amending law numbers, and status (current/old/not-yet-in-effect).
Attacks that exploit this kind of access
法令の改正履歴を取得する。e-Gov v2 /law_revisions を使用。各改正の公布日・施行日・改正法令番号・状態（現行/旧法/未施行）等を返す。. It is categorised as a Read tool in the Houki e-Gov MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Houki e-Gov MCP Server MCP server in PolicyLayer and add a rule for get_law_revisions: 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 Houki e-Gov MCP Server. Nothing to install.
get_law_revisions 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 get_law_revisions 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 get_law_revisions. 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.
get_law_revisions is provided by the Houki e-Gov MCP Server MCP server (shuji-bonji/houki-egov-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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