divide · Simple Calculator MCP: Risk & Policy

WHAT IT DOES

What divide does on Simple Calculator MCP

AI agents use divide to create or update resources in Simple Calculator MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Simple Calculator MCP environment.

WHY IT NEEDS A POLICY

Why divide needs a policy

An AI agent can call divide faster than any human can review — one bad instruction and it creates or modifies resources in Simple Calculator MCP by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

divide Rate-limited

divide stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "divide": {
      "limits": [
        {
          "counter": "divide_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Simple Calculator MCP, so you can run agents against it safely.

FAQ

Questions about divide

What does the divide tool do? +

计算两个数字的商. It is categorised as a Write tool in the Simple Calculator MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on divide? +

Register the Simple Calculator MCP server in PolicyLayer and add a rule for divide: 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 Simple Calculator MCP. Nothing to install.

What risk level is divide? +

divide is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit divide? +

Yes. Add a rate_limit block to the divide 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.

How do I block divide completely? +

Set action: deny in the PolicyLayer policy for divide. 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 divide? +

divide is provided by the Simple Calculator MCP server (sanlanglove/mcp-calculator). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.