sha256

What sha256 does on Crypto_MCP

AI agents call sha256 to retrieve information from Crypto_MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Why sha256 is rated Low

SHA-256 hashing is a pure computational operation that retrieves/computes a cryptographic digest from input data without modifying, creating, deleting, or executing any external operations. This is characteristic of Read category tools. Severity is low because hash computation poses minimal risk of misuse; the tool cannot modify data, execute code, or cause financial harm.

From the tool's definition Tool description states 'Calculate SHA-256 hash of a string' — a cryptographic hash function that computes a one-way digest. SHA-256 is deterministic and produces no side effects; it only reads input and returns output.

The rule that runs sha256 safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Crypto_MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For sha256, this is the rule to start with:

{
  "version": "1",
  "default": "deny",
  "tools": {
    "sha256": {}
  }
}

Questions about sha256