mysql_connect

THE RISK

Low Risk

Why mysql_connect needs a policy

This tool establishes a database connection rather than reading, writing, executing queries, or destroying data. It is a prerequisite for other operations but does not itself read, write, execute, or delete data. However, it could be misused to connect to unauthorized databases or expose credentials, warranting a medium severity.

From the tool's definition Connect to a MySQL database with provided connection parameters

Documented attack patterns abuse exactly the kind of access mysql_connect gives an agent:

POLICY

How to control mysql_connect

PolicyLayer is an MCP gateway — it sits between your AI agents and MCP MySQL Server, and nothing reaches the server without passing your rules. This is the rule we recommend for mysql_connect:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mysql_connect": {
      "limits": [
        {
          "counter": "mysql_connect_rate",
          "window": "minute",
          "max": 60,
          "scope": "grant"
        }
      ]
    }
  }
}

mysql_connect gets a rate cap, and everything else on the server is denied unless you say otherwise.

Create a free account and register MCP MySQL Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

SET A RULE FOR THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More MCP MySQL Server tools

Execute mysql_query Execute a SQL query on the connected MySQL database Write mysql_disconnect Disconnect from the MySQL database Read mysql_describe_table Get the structure/schema of a specific table Read mysql_get_table_stats Get statistics about a table (row count, size, etc.) Read mysql_list_databases List all databases on the MySQL server Read mysql_list_tables List all tables in the current or specified database Read mysql_show_indexes Show indexes for a specific table

All 8 MCP MySQL Server tools →

Other tools on other servers

Android Forensics ADB MCP Server generate_app_analysis_report Ethereum Tools add Math MCP Server complex_analysis_suite Crypto_MCP aes_encrypt

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Tool risk categories → How PolicyLayer classifies MCP tools by what they can do.
MCP tool → What an MCP tool is and how clients discover and call it.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about mysql_connect

What does the mysql_connect tool do? +

Connect to a MySQL database with provided connection parameters. It is categorised as a Other tool in the MCP MySQL Server MCP Server, which means it performs auxiliary operations.

How do I enforce a policy on mysql_connect? +

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

What risk level is mysql_connect? +

mysql_connect is a Other tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit mysql_connect? +

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

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

mysql_connect is provided by the MCP MySQL Server MCP server (sajithrw/mcp-mysql). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP MySQL Server tool call.

Start from MCP MySQL Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →