add · MCP-Claude MCP: Risk & Policy

WHAT IT DOES

What add does on MCP-Claude

AI agents call add as a supporting operation in MCP-Claude workflows.

WHY IT NEEDS A POLICY

Why add needs a policy

The tool performs a simple mathematical addition of two numbers. It does not read from or write to any data source, execute commands, delete data, or involve financial transactions. It is a stateless, in-memory computation with no blast radius if misused.

From the tool's definition 'Add two numbers' — this is a pure arithmetic computation with no side effects, no data retrieval, no writes, and no external operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add Rate-limited

add 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": {
    "add": {
      "limits": [
        {
          "counter": "add_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 MCP-Claude, so you can run agents against it safely.

FAQ

Questions about add

What does the add tool do? +

Add two numbers. It is categorised as a Other tool in the MCP-Claude MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on add? +

Register the MCP-Claude MCP server in PolicyLayer and add a rule for add: 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-Claude. Nothing to install.

What risk level is add? +

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

Can I rate-limit add? +

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

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

add is provided by the MCP-Claude MCP server (virajsamarasinghe/mcp-claude). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

// THE FULL RECORD

add is one line of MCP-Claude's registry record.

The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.

Teams ship this data inside their own products. See what a licence covers →