calculate-bmi

// WHEN AI AGENTS USE THIS TOOL

AI agents call calculate-bmi to retrieve information from My First MCP without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.

// WHY ENFORCE A POLICY ON CALCULATE-BMI

Even though calculate-bmi only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.

// RECOMMENDED POLICY

Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.

jhseo-git-my-first-mcp.yaml

tools:
  calculate-bmi:
    rules:
      - action: allow

See the full My First MCP policy for all 3 tools.

// DETAILS

Tool Name calculate-bmi

Category Read

MCP Server My First MCP MCP Server

Risk Level Low

// MORE MY FIRST MCP TOOLS

Read echo Read fetch-weather

// WHAT CAN GO WRONG

Agents calling read-class tools like calculate-bmi have been implicated in these attack patterns. Read the full case and prevention policy for each:

Browse the full MCP Attack Database →

// OTHER READ TOOLS ACROSS MCP SERVERS

Other tools in the Read risk category across the catalogue. The same policy patterns (rate-limit, allow) apply to each.

Firecrawl Web Scraping Server firecrawl_check_crawl_status Firecrawl Web Scraping Server firecrawl_crawl Firecrawl Web Scraping Server firecrawl_deep_research Firecrawl Web Scraping Server firecrawl_extract Firecrawl Web Scraping Server firecrawl_map Firecrawl Web Scraping Server firecrawl_scrape

// RELATED READING

// FAQ

What does the calculate-bmi tool do? +

calculate-bmi. It is categorised as a Read tool in the My First MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on calculate-bmi? +

Add a rule in your Intercept YAML policy under the tools section for calculate-bmi. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the My First MCP MCP server.

What risk level is calculate-bmi? +

calculate-bmi is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit calculate-bmi? +

Yes. Add a rate_limit block to the calculate-bmi rule in your Intercept 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.

How do I block calculate-bmi completely? +

Set action: deny in the Intercept 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.

What MCP server provides calculate-bmi? +

calculate-bmi is provided by the My First MCP MCP server (JHSeo-git/my-first-mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Let agents act without letting them run wild.