计算标准差
AI agents call standard_deviation to retrieve information from Math Calculation MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Standard deviation is a read-only mathematical operation that computes a statistic from input data. It retrieves/calculates a result without side effects, data modification, code execution, or destructive operations. The tool fits the Read category as it performs a query-like statistical computation on provided numeric data.
From the tool's definition Tool name 'standard_deviation' and description '计算标准差' (calculate standard deviation) indicate a statistical computation function that analyzes data without modifying it.
Attacks that exploit this kind of access
计算标准差. It is categorised as a Read tool in the Math Calculation MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Math Calculation MCP Server MCP server in PolicyLayer and add a rule for standard_deviation: 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 Math Calculation MCP Server. Nothing to install.
standard_deviation 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 standard_deviation 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 standard_deviation. 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.
standard_deviation is provided by the Math Calculation MCP Server MCP server (k-summer/math_mcps). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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