指定年の上昇日ベストランキング
AI agents call get_best_days 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 and ranks historical market performance data (best trading days in a given year). It performs no modifications, deletions, or financial transactions. The operation is read-only and informational. Consistent with sibling tools (get_daily_prices, get_price_on_date, get_price_range) which are all Read category.
From the tool's definition Tool name 'get_best_days' and description indicating ranking of best days in a specified year. The Japanese description translates to 'best ranking of days with gains for a specified year.' This is a query operation retrieving historical market data with no…
Attacks that exploit this kind of access
指定年の上昇日ベストランキング. 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_best_days: 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_best_days 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_best_days 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_best_days. 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_best_days 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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