subtract

A other tool on the Mcp Test Servers MCP server.

SERVERMcp Test Servers SOURCEmsfeldstein/mcp-test-servers

Low RISK CLASS

Category Other

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mcp-test-servers/subtract.md

WHAT IT DOES

What subtract does on Mcp Test Servers

AI agents call subtract as a supporting operation in Mcp Test Servers workflows.

RISK

Why subtract is rated Low

The name 'subtract' most likely refers to a basic arithmetic operation (similar to the sibling tool 'add'), which would be a pure computation with no side effects. However, with no description to confirm this, confidence is low. Arithmetic tools are generally harmless and fall outside the primary risk categories.

From the tool's definition Tool name is 'subtract'; description is empty and uninformative.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs subtract safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Mcp Test Servers, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For subtract, this is the rule to start with:

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.

The button opens the PolicyLayer dashboard: create your workspace, connect Mcp Test Servers, apply this rule, and every subtract call is checked against it from then on.

FAQ

Questions about subtract

What does the subtract tool do? +

subtract is a other tool on the Mcp Test Servers MCP server. It is categorised as a Other tool in the Mcp Test Servers MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on subtract? +

Register the Mcp Test Servers 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 Mcp Test Servers. 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 Mcp Test Servers MCP server (msfeldstein/mcp-test-servers). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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