AI agents call screen_market 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.
The ashare-mcp server exposes financial market data endpoints. 'screen_market' most likely screens or filters market data without modifying it. Sibling tools are all Read-category (get_*, download_*). No evidence of side effects, modifications, execution, deletion, or financial transactions. This is a data retrieval tool.
From the tool's definition Tool name 'screen_market' combined with sibling tools that are all data retrieval endpoints (get_balance_data, get_dividend_data, get_dupont_data, etc.) indicates this tool queries or filters market data.
Attacks that exploit this kind of access
screen_market. 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 screen_market: 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.
screen_market 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 screen_market 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 screen_market. 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.
screen_market 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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