AI agents call calc_bmi to retrieve information from UnClick without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
height_cm | number | Yes | |
weight_kg | number | Yes |
Parameters from the server's own tool schema.
BMI calculation is a deterministic mathematical operation (weight/height²) that reads input values and returns output without creating, modifying, deleting, or executing any external actions. This is a classic Read category tool - it retrieves/computes information without side effects. Severity is low as misuse poses minimal risk (worst case: incorrect health information for a user).
From the tool's definition Tool name 'calc_bmi' and description 'Calculate Body Mass Index (BMI)' indicate a pure calculation function that takes input parameters and returns a computed result with no side effects, data modification, or external operations.
Attacks that exploit this kind of access
Calculate Body Mass Index (BMI). It is categorised as a Read tool in the UnClick MCP Server, which means it retrieves data without modifying state.
calc_bmi accepts 2 parameters: height_cm, weight_kg. Required: height_cm, weight_kg. The full parameter table on this page comes from the server's own tool schema.
Register the UnClick MCP server in PolicyLayer and add a rule for calc_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 UnClick. Nothing to install.
calc_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 calc_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 calc_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.
calc_bmi is provided by the UnClick MCP server (@unclick/mcp-server). 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.
Teams ship this data inside their own products. See what a licence covers →