subtract · AEM Assets MCP Server MCP: Risk & Policy

WHAT IT DOES

What subtract does on AEM Assets MCP Server

AI agents call subtract as a supporting operation in AEM Assets MCP Server workflows.

WHY IT NEEDS A POLICY

Why subtract needs a policy

This tool performs a simple mathematical subtraction of two numbers. It has no side effects, does not read from or write to any system, and does not interact with AEM Assets or any external service. It is a pure compute utility that does not fit Read, Write, Execute, Destructive, or Financial categories.

From the tool's definition 'Use this to subtract two numbers' — pure arithmetic operation with no data access, modification, or external effects

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

subtract Rate-limited

subtract gets a rate cap, and 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": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

SET A RULE FOR THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about subtract

What does the subtract tool do? +

Use this to subtract two numbers. It is categorised as a Other tool in the AEM Assets MCP Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on subtract? +

Register the AEM Assets MCP Server 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 AEM Assets MCP Server. Nothing to install.

What risk level is subtract? +

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

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 AEM Assets MCP Server MCP server (satoshiinoue/aem-assets-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.