A tool to calculate the coefficient of variation (relative standard deviation) of a collection
AI agents call coefficient_of_variation_calculator to retrieve information from JeffersonStats without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The coefficient_of_variation_calculator performs mathematical computation on provided data and returns a statistical result. This is a read-only operation analogous to other descriptive statistics tools on the server (descriptive_statistics_summary, correlation_calculator, etc.). It has no capacity to modify data, delete records, execute code, or produce financial transactions.
From the tool's definition Tool description states it 'calculate[s] the coefficient of variation (relative standard deviation) of a collection' — a pure computational analysis function that returns statistical metrics without modifying data, creating side effects, or executing…
Attacks that exploit this kind of access
A tool to calculate the coefficient of variation (relative standard deviation) of a collection. It is categorised as a Read tool in the JeffersonStats MCP Server, which means it retrieves data without modifying state.
Register the JeffersonStats MCP server in PolicyLayer and add a rule for coefficient_of_variation_calculator: 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 JeffersonStats. Nothing to install.
coefficient_of_variation_calculator 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 coefficient_of_variation_calculator 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 coefficient_of_variation_calculator. 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.
coefficient_of_variation_calculator is provided by the JeffersonStats MCP server (sharabhshukla/jeffersonstatsmcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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