vigenere_encrypt · Crypto Tools MCP Server MCP

WHAT IT DOES

What vigenere_encrypt does on Crypto Tools MCP Server

AI agents invoke vigenere_encrypt to trigger actions in Crypto Tools MCP Server. 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 vigenere_encrypt needs a policy

The tool executes a cipher algorithm (Vigenère encryption) that transforms plaintext into ciphertext. This is an Execute category operation as it performs a computation/transformation rather than simply reading or writing stored data.

From the tool's definition 'Encrypt plaintext using Vigenère cipher' — performs a cryptographic transformation operation on input data

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

vigenere_encrypt Rate-limited

vigenere_encrypt 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": {
    "vigenere_encrypt": {
      "limits": [
        {
          "counter": "vigenere_encrypt_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 Crypto Tools MCP Server, so you can run agents against it safely.

FAQ

Questions about vigenere_encrypt

What does the vigenere_encrypt tool do? +

Encrypt plaintext using Vigenère cipher. It is categorised as a Execute tool in the Crypto Tools MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on vigenere_encrypt? +

Register the Crypto Tools MCP Server MCP server in PolicyLayer and add a rule for vigenere_encrypt: 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 Crypto Tools MCP Server. Nothing to install.

What risk level is vigenere_encrypt? +

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

Can I rate-limit vigenere_encrypt? +

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

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

vigenere_encrypt is provided by the Crypto Tools MCP Server MCP server (marc-shade/crypto-tools-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.