calc_black_scholes_theta
AI agents call calc_black_scholes_theta 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 a mathematical calculation (Black-Scholes Theta computation) that retrieves or derives quantitative results based on input parameters. It has no side effects on data, does not execute arbitrary code, and does not modify any state. The tool is purely computational and read-like in nature.
From the tool's definition Tool name 'calc_black_scholes_theta' indicates calculation of Theta (a Greek in options pricing). The server description confirms these are calculational tools that 'enables calculation of European option prices and Greeks'.
Attacks that exploit this kind of access
calc_black_scholes_theta. 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_theta: 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_theta 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_theta 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_theta. 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_theta 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.
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