KARTEイベントテーブルのスキーマを取得する。
AI agents call describe_karte_events_schema to retrieve information from Karte Datahub without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves metadata about table structure without accessing actual event data, modifying records, executing arbitrary code, or deleting anything. It is purely informational and enables exploration of available fields. Classified as Read with low severity since schema disclosure has minimal blast radius—it only reveals data structure, not sensitive values.
From the tool's definition Tool name and description indicate schema introspection: 'describe_karte_events_schema' and 'KARTEイベントテーブルのスキーマを取得する' (retrieve KARTE event table schema). Schema inspection is a read-only operation with no data modification or execution.
Attacks that exploit this kind of access
KARTEイベントテーブルのスキーマを取得する。. It is categorised as a Read tool in the Karte Datahub MCP Server, which means it retrieves data without modifying state.
Register the Karte Datahub MCP server in PolicyLayer and add a rule for describe_karte_events_schema: 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 Karte Datahub. Nothing to install.
describe_karte_events_schema 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 describe_karte_events_schema 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 describe_karte_events_schema. 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.
describe_karte_events_schema is provided by the Karte Datahub MCP server (yusukeyajima/karte-datahub-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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