pg_pgcrypto_crypt

Hash a password using crypt() with a salt from gen_salt().

SERVERPostgreSQL MCP Server SOURCE@neverinfamous/postgres-mcp

High RISK CLASS

Category Execute

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-neverinfamous-postgres-mcp/pg-pgcrypto-crypt.md

WHAT IT DOES

What pg_pgcrypto_crypt does on PostgreSQL MCP Server

AI agents invoke pg_pgcrypto_crypt to trigger actions in PostgreSQL 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.

RISK

Why pg_pgcrypto_crypt is rated High

This tool executes a cryptographic function (crypt) against input data using a generated salt. It performs a computation/operation rather than simply reading existing data or writing to storage directly. The operation itself is a transformation/execution of a crypto function. Misuse risk is medium — it could be used to hash arbitrary strings, but doesn't directly expose stored data or modify database state.

From the tool's definition Hash a password using crypt() with a salt from gen_salt()

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pg_pgcrypto_crypt safely

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

pg_pgcrypto_crypt Rate-limited

pg_pgcrypto_crypt 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": {
    "pg_pgcrypto_crypt": {
      "limits": [
        {
          "counter": "pg_pgcrypto_crypt_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect PostgreSQL MCP Server, apply this rule, and every pg_pgcrypto_crypt call is checked against it from then on.

FAQ

Questions about pg_pgcrypto_crypt

What does the pg_pgcrypto_crypt tool do? +

Hash a password using crypt() with a salt from gen_salt(). It is categorised as a Execute tool in the PostgreSQL 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 pg_pgcrypto_crypt? +

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

What risk level is pg_pgcrypto_crypt? +

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

Can I rate-limit pg_pgcrypto_crypt? +

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

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

pg_pgcrypto_crypt is provided by the PostgreSQL MCP Server MCP server (@neverinfamous/postgres-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

What pg_pgcrypto_crypt does on PostgreSQL MCP Server

Why pg_pgcrypto_crypt is rated High

The rule that runs pg_pgcrypto_crypt safely

Questions about pg_pgcrypto_crypt

More on PostgreSQL MCP Server, and thousands of servers like it.