計算數組的統計信息（平均值、中位數、標準差等）
AI agents call statistics to retrieve information from Node Js MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The statistics tool performs read-only mathematical analysis on input data. It retrieves and computes descriptive statistics without side effects, state changes, or external system impact. This is a purely computational, non-destructive operation typical of data analysis functions.
From the tool's definition Tool description states it 'calculates statistical information (mean, median, standard deviation, etc.)' on arrays. No modification, deletion, or execution of external operations occurs.
Attacks that exploit this kind of access
計算數組的統計信息（平均值、中位數、標準差等）. It is categorised as a Read tool in the Node Js MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Node Js MCP Server MCP server in PolicyLayer and add a rule for statistics: 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 Node Js MCP Server. Nothing to install.
statistics 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 statistics 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 statistics. 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.
statistics is provided by the Node Js MCP Server MCP server (weiweicode/20250923mcptest). 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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