screen_kr_breakout
AI agents call screen_kr_breakout to retrieve information from Stock MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool appears to query and filter stock data to identify breakout patterns in Korean stocks. Screening is fundamentally a Read operation—it retrieves and analyzes data without modifying it or triggering external actions.
From the tool's definition Tool name 'screen_kr_breakout' suggests screening/filtering Korean stocks for breakout patterns. No description provided, but context from sibling tools (screen_kr_momentum, screen_us_breakout, screen_us_momentum) all appear to be screening/analysis functions.
Attacks that exploit this kind of access
screen_kr_breakout. It is categorised as a Read tool in the Stock MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Stock MCP Server MCP server in PolicyLayer and add a rule for screen_kr_breakout: 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 Stock MCP Server. Nothing to install.
screen_kr_breakout 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_kr_breakout 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_kr_breakout. 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_kr_breakout is provided by the Stock MCP Server MCP server (juuuuuuni/stock-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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