geometric_variate
AI agents call geometric_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.
Geometric distribution sampling is a read-only operation that retrieves/generates random data with no side effects, state modification, or external impact. It fits the Read category. The empty description reduces confidence slightly, but the naming pattern and context of sibling tools on a dedicated RNG server (FortunaMCP) strongly indicate this is a stateless random number generation function.
From the tool's definition Tool name 'geometric_variate' with empty description suggests a function that generates random values from a geometric distribution, consistent with sibling tools (bernoulli_variate, beta_variate, etc.) that are all RNG/sampling operations.
Attacks that exploit this kind of access
geometric_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 geometric_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.
geometric_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 geometric_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 geometric_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.
geometric_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.
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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