create_function

A write tool on the Mysql MCP server.

SERVERMysql SOURCEmukul975/mysql-mcp-server

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/mukul975-mysql-mcp-server/create-function.md

WHAT IT DOES

What create_function does on Mysql

AI agents use create_function to create or update resources in Mysql, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mysql environment.

RISK

Why create_function is rated Medium

Based on the tool name alone, 'create_function' most likely creates a stored function in the MySQL database, which is a Write operation. However, stored functions can execute arbitrary SQL logic including destructive operations. The empty description lowers confidence significantly. Given sibling tools like 'create_stored_procedure' and 'create_event', this fits a pattern of DDL/object-creation tools.

From the tool's definition Tool name 'create_function' suggests creation of a database function; description is empty and uninformative.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_function safely

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

create_function Rate-limited

create_function stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_function": {
      "limits": [
        {
          "counter": "create_function_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about create_function

What does the create_function tool do? +

create_function is a write tool on the Mysql MCP server. It is categorised as a Write tool in the Mysql MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_function? +

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

What risk level is create_function? +

create_function is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_function? +

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

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

create_function is provided by the Mysql MCP server (mukul975/mysql-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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