Calculate BMI given weight in kg and height in meters
AI agents call calculate_bmi to retrieve information from MCP-YNU FastMCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a pure computation tool that takes input parameters (weight in kg, height in meters) and returns a calculated result (BMI). It performs no I/O operations, does not access external systems, does not modify any data, and has no side effects. It is safely categorized as Read (data computation with no side effects).
From the tool's definition Tool calculates BMI from user-provided weight and height inputs; no data retrieval, modification, deletion, or external system interaction described.
Attacks that exploit this kind of access
Calculate BMI given weight in kg and height in meters. It is categorised as a Read tool in the MCP-YNU FastMCP Server MCP Server, which means it retrieves data without modifying state.
Register the MCP-YNU FastMCP Server MCP server in PolicyLayer and add a rule for calculate_bmi: 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 MCP-YNU FastMCP Server. Nothing to install.
calculate_bmi 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 calculate_bmi 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 calculate_bmi. 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.
calculate_bmi is provided by the MCP-YNU FastMCP Server MCP server (ynu/mcp-ynu). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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