指定銘柄・期間の日次価格データを一括取得
AI agents call get_daily_prices to retrieve information from Market Index MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical market index price data without modifying, deleting, executing code, or committing financial transactions. It is a pure query/fetch operation on read-only reference data. The blast radius of misuse is minimal — an AI agent querying historical prices cannot cause harm beyond consuming API quota or returning unwanted information.
From the tool's definition Tool name 'get_daily_prices' and description (in Japanese: 'Bulk retrieve daily price data for specified symbols/periods') indicates data retrieval.
Attacks that exploit this kind of access
指定銘柄・期間の日次価格データを一括取得. It is categorised as a Read tool in the Market Index MCP MCP Server, which means it retrieves data without modifying state.
Register the Market Index MCP server in PolicyLayer and add a rule for get_daily_prices: 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 Market Index MCP. Nothing to install.
get_daily_prices 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_daily_prices 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_daily_prices. 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_daily_prices is provided by the Market Index MCP server (tamappe/market-index-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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