mysql_show_variables

Show server configuration variables.

SERVERMysql Mcp SOURCEoci:docker.io/writenotenow/mysql-mcp:v1.0.0

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-neverinfamous-mysql-mcp/mysql-show-variables.md

WHAT IT DOES

What mysql_show_variables does on Mysql Mcp

AI agents call mysql_show_variables to retrieve information from Mysql Mcp without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why mysql_show_variables is rated Low

This tool performs a read-only operation (SHOW VARIABLES in MySQL) that queries server configuration metadata. It has no side effects, does not execute arbitrary code, and does not modify data. While configuration details could theoretically inform an attacker about system weaknesses, the tool itself is purely informational and low-risk.

From the tool's definition Tool name 'mysql_show_variables' and description 'Show server configuration variables' indicate a query operation that retrieves and displays configuration data without modifying or executing operations.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mysql_show_variables safely

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

mysql_show_variables Allowed

mysql_show_variables is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mysql_show_variables": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Mysql Mcp, apply this rule, and every mysql_show_variables call is checked against it from then on.

FAQ

Questions about mysql_show_variables

What does the mysql_show_variables tool do? +

Show server configuration variables. It is categorised as a Read tool in the Mysql Mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on mysql_show_variables? +

Register the Mysql MCP server in PolicyLayer and add a rule for mysql_show_variables: 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 Mysql Mcp. Nothing to install.

What risk level is mysql_show_variables? +

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

Can I rate-limit mysql_show_variables? +

Yes. Add a rate_limit block to the mysql_show_variables 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_show_variables completely? +

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

mysql_show_variables is provided by the Mysql MCP server (oci:docker.io/writenotenow/mysql-mcp:v1.0.0). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

More on Mysql, and thousands of servers like it.

This server

All 223 Mysql tools →

Across the catalogue

The MCP Attack Database →

Guides

Roll out MCP under one policy →Data exfiltration →MCP token cost →