negative_binomial_variate
AI agents call negative_binomial_variate to retrieve information from FortunaMCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool generates and returns random values based on a statistical distribution. Random value generation is a read-like operation—it retrieves computed data with no persistence, modification, or external side effects. No data is created, modified, deleted, or financial operations are involved.
From the tool's definition Tool name 'negative_binomial_variate' indicates generation of random values from a negative binomial distribution. Server description emphasizes 'generating high-quality random values' using Fortuna C-extension.
Attacks that exploit this kind of access
negative_binomial_variate. It is categorised as a Read tool in the FortunaMCP MCP Server, which means it retrieves data without modifying state.
Register the Fortuna MCP server in PolicyLayer and add a rule for negative_binomial_variate: 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 FortunaMCP. Nothing to install.
negative_binomial_variate 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 negative_binomial_variate 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 negative_binomial_variate. 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.
negative_binomial_variate is provided by the Fortuna MCP server (siliconsociety/fortunamcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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