Get top 20 foreign and mainland investor stock holdings
AI agents call getTopForeignHoldings to retrieve information from TWSE MCP Server 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 publicly available or authorized financial market data about foreign investor holdings. It performs no mutations, deletions, executions, or financial transactions. The worst-case misuse would be information gathering or market analysis without actual impact on systems or data integrity.
From the tool's definition Tool name 'getTopForeignHoldings' and description 'Get top 20 foreign and mainland investor stock holdings' indicate a retrieval operation with no side effects.
Attacks that exploit this kind of access
Get top 20 foreign and mainland investor stock holdings. It is categorised as a Read tool in the TWSE MCP Server MCP Server, which means it retrieves data without modifying state.
Register the TWSE MCP Server MCP server in PolicyLayer and add a rule for getTopForeignHoldings: 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 TWSE MCP Server. Nothing to install.
getTopForeignHoldings 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 getTopForeignHoldings 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 getTopForeignHoldings. 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.
getTopForeignHoldings is provided by the TWSE MCP Server MCP server (pyang2045/twsemcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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