get_prefecture_data
AI agents call get_prefecture_data to retrieve information from MLIT Data Platform MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'get_' prefix and sibling tools all retrieve or query data without side effects. While the description is empty (lowering confidence slightly), the naming convention and server purpose (natural language search and retrieval of Japanese government data) indicate this tool queries prefecture-level data from the MLIT Data Platform. No modification, execution, deletion, or financial operations are implied.
From the tool's definition Tool name 'get_prefecture_data' follows the retrieval pattern consistent with sibling tools (get_all_data, get_data, get_municipality_data), all prefixed with 'get_'. No description provided, but contextual naming and pattern strongly suggest data retrieval.
Attacks that exploit this kind of access
get_prefecture_data. It is categorised as a Read tool in the MLIT Data Platform MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MLIT Data Platform MCP Server MCP server in PolicyLayer and add a rule for get_prefecture_data: 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 MLIT Data Platform MCP Server. Nothing to install.
get_prefecture_data 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_prefecture_data 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_prefecture_data. 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_prefecture_data is provided by the MLIT Data Platform MCP Server MCP server (mlit-data-platform/mlit-dpf-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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