インデックス済み企業の一覧を取得します。
AI agents call list_indexed_companies to retrieve information from Japan Ir Search 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 an index to return company metadata—a read-only operation with no side effects. It falls squarely into the Read category. Severity is low because the information returned is likely public corporate filing metadata with no sensitive data or operational impact. Confidence is high given the clear retrieval semantics and lack of any write/execute/destructive language.
From the tool's definition Tool name 'list_indexed_companies' and description 'インデックス済み企業の一覧を取得します' (Get a list of indexed companies) indicate retrieval of metadata about available companies in the index. No modification, deletion, or execution of external operations occurs.
Attacks that exploit this kind of access
インデックス済み企業の一覧を取得します。. It is categorised as a Read tool in the Japan Ir Search MCP Server, which means it retrieves data without modifying state.
Register the Japan Ir Search MCP server in PolicyLayer and add a rule for list_indexed_companies: 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 Japan Ir Search. Nothing to install.
list_indexed_companies 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 list_indexed_companies 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 list_indexed_companies. 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.
list_indexed_companies is provided by the Japan Ir Search MCP server (tamcho113/japan-ir-search). 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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