encrypt_decrypt · MCP Workspace Server MCP: Risk & Policy

WHAT IT DOES

What encrypt_decrypt does on MCP Workspace Server

AI agents invoke encrypt_decrypt to trigger actions in MCP Workspace 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 encrypt_decrypt needs a policy

This tool performs cryptographic operations on files and text, which constitutes execution of operations with significant side effects. Encrypting files can render them inaccessible (potentially irreversible without the key), decrypting files can expose sensitive data, and generating/managing encryption keys has serious security implications.

From the tool's definition Encrypt/decrypt files or text, generate hashes, create encryption keys

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

encrypt_decrypt Rate-limited

encrypt_decrypt 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": {
    "encrypt_decrypt": {
      "limits": [
        {
          "counter": "encrypt_decrypt_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 MCP Workspace Server, so you can run agents against it safely.

FAQ

Questions about encrypt_decrypt

What does the encrypt_decrypt tool do? +

Encrypt/decrypt files or text, generate hashes, create encryption keys. It is categorised as a Execute tool in the MCP Workspace 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 encrypt_decrypt? +

Register the MCP Workspace Server MCP server in PolicyLayer and add a rule for encrypt_decrypt: 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 Workspace Server. Nothing to install.

What risk level is encrypt_decrypt? +

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

Can I rate-limit encrypt_decrypt? +

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

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

encrypt_decrypt is provided by the MCP Workspace Server MCP server (shayyeffet/ultimate_mcp_server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.