calculate_williams_r | PolicyLayer

WHAT IT DOES

What calculate_williams_r does on Sperax Ecosystem Crypto & DeFI MCP Server

AI agents call calculate_williams_r to retrieve information from Sperax Ecosystem Crypto & DeFI MCP Server 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 calculate_williams_r needs a policy

This is a read-only financial analysis tool that computes a standard technical indicator (Williams R) from historical OHLCV (Open, High, Low, Close, Volume) data. It has no side effects, does not execute trades, modify blockchain state, or trigger external operations. It merely queries and analyzes market data.

From the tool's definition Tool calculates Williams R indicator using existing OHLCV data; it retrieves and processes market data without modifying state, executing transactions, or triggering external operations.

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

POLICY

How to control calculate_williams_r

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_williams_r:

policy.json

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

calculate_williams_r 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

Related tools and policies

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The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
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FAQ

Questions about calculate_williams_r

What does the calculate_williams_r tool do? +

Calculate the Williams R (WILLR) 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_williams_r? +

Register the Sperax Ecosystem Crypto & DeFI MCP Server MCP server in PolicyLayer and add a rule for calculate_williams_r: 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_williams_r? +

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

Can I rate-limit calculate_williams_r? +

Yes. Add a rate_limit block to the calculate_williams_r 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_williams_r completely? +

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

calculate_williams_r 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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1318 Sperax Ecosystem Crypto & DeFI MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.