normal_distribution

ServerMCP Calc Tools
CategoryRead

WHAT IT DOES

What normal_distribution does on MCP Calc Tools

AI agents call normal_distribution to retrieve information from MCP Calc Tools without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why normal_distribution needs a policy

The tool performs a deterministic mathematical function evaluation (PDF calculation) with no side effects, no data creation/modification, no code execution, no deletion, and no financial transactions. It is a straightforward read-only computation similar to query or fetch operations on static mathematical functions.

From the tool's definition Tool name 'normal_distribution' and description indicate it 'Evaluate[s] the Normal probability density function (PDF) at a point.

Documented attack patterns abuse exactly the kind of access normal_distribution gives an agent:

POLICY

How to control normal_distribution

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP Calc Tools, and nothing reaches the server without passing your rules. This is the rule we recommend for normal_distribution:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "normal_distribution": {}
  }
}

normal_distribution is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register MCP Calc Tools — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More MCP Calc Tools tools

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
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Rate Limiting MCP Tool Calls: A Practical Guide →
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FAQ

Questions about normal_distribution

What does the normal_distribution tool do? +

Evaluate the Normal probability density function (PDF) at a point. Returns the density value. Examples: normal_distribution(0) -> 0.3989 (peak of standard normal), normal_distribution(1, 0, 1) -> 0.2420. It is categorised as a Read tool in the MCP Calc Tools MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on normal_distribution? +

Register the MCP Calc Tools MCP server in PolicyLayer and add a rule for normal_distribution: 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 Calc Tools. Nothing to install.

What risk level is normal_distribution? +

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

Can I rate-limit normal_distribution? +

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

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

normal_distribution is provided by the MCP Calc Tools MCP server (nbiish/mcp-calc-tools). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Calc Tools tool call.

Start from MCP Calc Tools, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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22 MCP Calc Tools tools catalogued and risk-classified — across an index of 43,000+ MCP servers.