AI agents call get_performance_stats to retrieve information from Juejin without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves performance metrics without modifying, executing external operations, deleting data, or affecting financial systems. It is a pure read operation that returns statistical information about system performance. No side effects or state changes occur.
From the tool's definition Tool name 'get_performance_stats' and description '获取系统性能统计信息，包括响应时间、内存使用等指标' (Get system performance statistics, including response time, memory usage and other metrics) indicate retrieval of monitoring/diagnostic data only.
Attacks that exploit this kind of access
获取系统性能统计信息，包括响应时间、内存使用等指标. It is categorised as a Read tool in the Juejin MCP Server, which means it retrieves data without modifying state.
Register the Juejin MCP server in PolicyLayer and add a rule for get_performance_stats: 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 Juejin. Nothing to install.
get_performance_stats 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_performance_stats 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_performance_stats. 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_performance_stats is provided by the Juejin MCP server (ztxtxwd/juejin-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.
Teams ship this data inside their own products. See what a licence covers →