AI agents call get_balance_data to retrieve information from Ashare without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves pre-computed financial data from baostock's database. It performs a read-only query operation with no side effects—no data is created, modified, deleted, or executed. The quarterly parameter merely selects which time period of data to fetch. Classification as Read is appropriate; severity is low since unauthorized access to public financial data poses minimal risk.
From the tool's definition Tool retrieves quarterly financial ratios (balance-sheet/solvency data); described as 'get_' operation with no modification capability. The endpoint is for querying historical financial metrics indexed by quarter.
Attacks that exploit this kind of access
Quarterly solvency / balance-sheet ratios (季频偿债能力). quarter 1..4. It is categorised as a Read tool in the Ashare MCP Server, which means it retrieves data without modifying state.
Register the Ashare MCP server in PolicyLayer and add a rule for get_balance_data: 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 Ashare. Nothing to install.
get_balance_data 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_balance_data 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_balance_data. 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_balance_data is provided by the Ashare MCP server (maimai-hqw/ashare-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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