subtract · LLM Tool-Calling Assistant MCP: Risk & Policy

WHAT IT DOES

What subtract does on LLM Tool-Calling Assistant

AI agents invoke subtract to trigger actions in LLM Tool-Calling Assistant. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why subtract needs a policy

This tool executes a mathematical operation (subtraction) on two numbers. While arithmetic is low-risk, it is an operation/execution rather than a pure data retrieval. Misuse potential is minimal — worst case is an incorrect calculation — giving it a low severity rating.

From the tool's definition 'Subtracting the second number from the first' — performs a arithmetic computation/operation

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

subtract Rate-limited

subtract stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "subtract": {
      "limits": [
        {
          "counter": "subtract_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches LLM Tool-Calling Assistant, so you can run agents against it safely.

FAQ

Questions about subtract

What does the subtract tool do? +

Subtracting the second number from the first. It is categorised as a Execute tool in the LLM Tool-Calling Assistant MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on subtract? +

Register the LLM Tool-Calling Assistant MCP server in PolicyLayer and add a rule for subtract: 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 LLM Tool-Calling Assistant. Nothing to install.

What risk level is subtract? +

subtract is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit subtract? +

Yes. Add a rate_limit block to the subtract 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 subtract completely? +

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

subtract is provided by the LLM Tool-Calling Assistant MCP server (o6-webwork/mcp-template). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.