calculate_moving_standard_deviation

THE RISK

Low Risk

Why calculate_moving_standard_deviation needs a policy

This is a pure data analysis and retrieval operation that queries historical price data and computes a technical indicator. It does not create, modify, delete, or execute any transactions. The tool retrieves information and performs calculations on that data without reversible or irreversible modifications to any system state. This clearly fits the Read category as it fetches and analyzes data with no side effects.

From the tool's definition The tool 'calculate_moving_standard_deviation' calculates a statistical metric (Moving Standard Deviation) using historical OHLCV (Open, High, Low, Close, Volume) data from Binance.

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

POLICY

How to control calculate_moving_standard_deviation

PolicyLayer is an MCP gateway — it sits between your AI agents and Sperax Ecosystem Crypto & DeFI MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for calculate_moving_standard_deviation:

policy.json

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

calculate_moving_standard_deviation 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 Sperax Ecosystem Crypto & DeFI MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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FAQ

Questions about calculate_moving_standard_deviation

What does the calculate_moving_standard_deviation tool do? +

Calculate the Moving Standard Deviation (MSTD) for a given trading pair using Binance OHLCV data. It is categorised as a Read tool in the Sperax Ecosystem Crypto & DeFI MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on calculate_moving_standard_deviation? +

Register the Sperax Ecosystem Crypto & DeFI MCP Server MCP server in PolicyLayer and add a rule for calculate_moving_standard_deviation: 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 Sperax Ecosystem Crypto & DeFI MCP Server. Nothing to install.

What risk level is calculate_moving_standard_deviation? +

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

Can I rate-limit calculate_moving_standard_deviation? +

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

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

calculate_moving_standard_deviation is provided by the Sperax Ecosystem Crypto & DeFI MCP Server MCP server (sperax/sperax-crypto-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Sperax Ecosystem Crypto & DeFI MCP Server tool call.

Start from Sperax Ecosystem Crypto & DeFI MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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