法令本文をキーワードで横断全文検索する。HOUKI_HUB_BULK_CACHE=1 環境時に SQLite FTS5 で動作。未有効時は API フォールバック。
AI agents call search_fulltext 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 data from a Japanese laws database without side effects. It performs information retrieval only—searching legal text by keywords and returning results. No data is modified, deleted, or executed. It falls squarely into the Read category with low severity since misuse would only return unwanted legal information, with no irreversible consequences.
From the tool's definition Tool name 'search_fulltext' and description indicate keyword-based full-text search of Japanese law documents ('法令本文をキーワードで横断全文検索する'). The implementation uses SQLite FTS5 (full-text search index) or API fallback, both read-only operations.
Attacks that exploit this kind of access
法令本文をキーワードで横断全文検索する。HOUKI_HUB_BULK_CACHE=1 環境時に SQLite FTS5 で動作。未有効時は API フォールバック。. 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_fulltext: 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_fulltext 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_fulltext 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_fulltext. 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_fulltext 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.
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