Generate bcrypt hash or verify password against hash
AI agents invoke hash_bcrypt to trigger actions in IT 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.
This tool executes a cryptographic computation (bcrypt hashing or password verification). It doesn't simply read existing data, nor does it write/modify stored data — it performs an active computation/operation. Misuse could facilitate password attacks or credential verification bypass attempts, giving it medium severity.
From the tool's definition Generate bcrypt hash or verify password against hash
Documented attack patterns abuse exactly the kind of access hash_bcrypt gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and IT Tools MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for hash_bcrypt:
{
"version": "1",
"default": "deny",
"tools": {
"hash_bcrypt": {
"limits": [
{
"counter": "hash_bcrypt_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}hash_bcrypt 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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Generate bcrypt hash or verify password against hash. It is categorised as a Execute tool in the IT Tools MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the IT Tools MCP Server MCP server in PolicyLayer and add a rule for hash_bcrypt: 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 IT Tools MCP Server. Nothing to install.
hash_bcrypt 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 hash_bcrypt 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 hash_bcrypt. 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.
hash_bcrypt is provided by the IT Tools MCP Server MCP server (wrenchpilot/it-tools-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from IT Tools 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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119 IT Tools MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.