calc_black_scholes_epsilon
AI agents call calc_black_scholes_epsilon to retrieve information from Black-Scholes MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs mathematical calculations of option Greeks (epsilon measures the rate of change of delta with respect to the underlying asset price). It retrieves computed financial metrics without modifying any data, executing external operations, or committing financial obligations. Despite the financial domain, the tool itself is a pure calculation that returns read-only analytical results.
From the tool's definition Tool name indicates it calculates a Greek (epsilon) using the Black-Scholes model. The server description states the server 'Enables calculation of European option prices and Greeks.' The tool description is empty, but sibling tools (calc_black_scholes_delta,…
Attacks that exploit this kind of access
calc_black_scholes_epsilon. It is categorised as a Read tool in the Black-Scholes MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Black-Scholes MCP Server MCP server in PolicyLayer and add a rule for calc_black_scholes_epsilon: 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 Black-Scholes MCP Server. Nothing to install.
calc_black_scholes_epsilon 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 calc_black_scholes_epsilon 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 calc_black_scholes_epsilon. 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.
calc_black_scholes_epsilon is provided by the Black-Scholes MCP Server MCP server (walkingshamrock/black-scholes-mcp). 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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