AI agents call calculate_ddm_valuation to retrieve information from A Share without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves or derives read-only financial metrics from query parameters and historical data. It does not create, modify, delete data, execute shell commands, or trigger financial transactions. It is a computational analysis tool that falls squarely within the Read category. Severity is low because misuse would produce incorrect valuation estimates with no immediate system or data integrity impact.
From the tool's definition Tool name 'calculate_ddm_valuation' and description indicate a Dividend Discount Model calculation for intrinsic stock value.
Attacks that exploit this kind of access
使用股息贴现模型(DDM)计算股票的内在价值。. It is categorised as a Read tool in the A Share MCP Server, which means it retrieves data without modifying state.
Register the A Share MCP server in PolicyLayer and add a rule for calculate_ddm_valuation: 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 A Share. Nothing to install.
calculate_ddm_valuation 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 calculate_ddm_valuation 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 calculate_ddm_valuation. 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.
calculate_ddm_valuation is provided by the A Share MCP server (kissjerryfan/mcp_server). 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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