AI agents invoke des_encrypt to trigger actions in Crypto_MCP. 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.
DES encryption is an external cryptographic operation that transforms plaintext into ciphertext. It doesn't simply read or write stored data, but executes a cryptographic transformation. While not destructive or financial, misuse could enable obfuscation of data for exfiltration.
From the tool's definition 'encrypt text with des' — performs a cryptographic operation (DES encryption) that transforms data and may be used to obfuscate information for exfiltration or other purposes
Documented attack patterns abuse exactly the kind of access des_encrypt gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Crypto_MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for des_encrypt:
{
"version": "1",
"default": "deny",
"tools": {
"des_encrypt": {
"limits": [
{
"counter": "des_encrypt_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}des_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.
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encrypt text with des. It is categorised as a Execute tool in the Crypto_MCP MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Crypto_ MCP server in PolicyLayer and add a rule for des_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_MCP. Nothing to install.
des_encrypt is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the des_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.
Set action: deny in the PolicyLayer policy for des_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.
des_encrypt is provided by the Crypto_ MCP server (1595901624/crypto-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Crypto_MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
14 Crypto_MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.