日本の法令をキーワード・略称・分野で検索する。e-Gov法令API v2 を使用。略称辞書による正式名称への自動補完あり。
AI agents call search_law 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 retrieves and queries Japanese legal information without creating, modifying, deleting, or executing operations. The search functionality is non-destructive and has no side effects beyond returning matching legal documents. The abbreviation auto-completion feature is supplementary to the core search operation.
From the tool's definition Tool description explicitly states it performs search ('検索') of Japanese laws by keyword, abbreviation, and field using the e-Gov API v2. The term 'search' and lack of any mention of modification, deletion, or execution indicates a retrieval-only operation.
Attacks that exploit this kind of access
日本の法令をキーワード・略称・分野で検索する。e-Gov法令API v2 を使用。略称辞書による正式名称への自動補完あり。. 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 search_law: 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.
search_law 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 search_law 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 search_law. 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.
search_law 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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