modulus · DateTime-LocalMCPServer MCP: Risk & Policy

WHAT IT DOES

What modulus does on DateTime-LocalMCPServer

AI agents invoke modulus to trigger actions in DateTime-LocalMCPServer. 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 modulus needs a policy

This tool performs a mathematical computation (modulus operation) on provided inputs. It executes a calculation rather than purely reading stored data, writing/modifying data, or performing destructive/financial actions. The blast radius is low as it only computes a numeric result with no side effects on external systems.

From the tool's definition Apply modulus operation sequentially from left to right

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

modulus Rate-limited

modulus 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": {
    "modulus": {
      "limits": [
        {
          "counter": "modulus_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 DateTime-LocalMCPServer, so you can run agents against it safely.

FAQ

Questions about modulus

What does the modulus tool do? +

Apply modulus operation sequentially from left to right. It is categorised as a Execute tool in the DateTime-LocalMCPServer MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on modulus? +

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

What risk level is modulus? +

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

Can I rate-limit modulus? +

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

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

modulus is provided by the DateTime-LocalMCPServer MCP server (vikasprajapati1998/datetime-localmcpserver). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.