mysql_alter_table_add_column

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/mysql-alter-table-add-column.md

WHAT IT DOES

What mysql_alter_table_add_column does on Mysql

AI agents use mysql_alter_table_add_column 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 mysql_alter_table_add_column is rated Medium

ALTER TABLE ADD COLUMN is a reversible Write operation that modifies table structure. While it can be undone with DROP COLUMN, it directly modifies the database schema and could break application logic, corrupt data layouts, or cause downtime. It is not Destructive because the original data is not lost, only the schema changes.

From the tool's definition Tool name 'mysql_alter_table_add_column' indicates it modifies table schema by adding columns. The server description claims 'read-only queries' but this tool contradicts that—ALTER TABLE is a DDL operation that modifies data structure.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs mysql_alter_table_add_column 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 mysql_alter_table_add_column, this is the rule to start with:

mysql_alter_table_add_column Rate-limited

mysql_alter_table_add_column 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": {
    "mysql_alter_table_add_column": {
      "limits": [
        {
          "counter": "mysql_alter_table_add_column_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 mysql_alter_table_add_column call is checked against it from then on.

FAQ

Questions about mysql_alter_table_add_column

What does the mysql_alter_table_add_column tool do? +

mysql_alter_table_add_column 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 mysql_alter_table_add_column? +

Register the Mysql MCP server in PolicyLayer and add a rule for mysql_alter_table_add_column: 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 mysql_alter_table_add_column? +

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

Can I rate-limit mysql_alter_table_add_column? +

Yes. Add a rate_limit block to the mysql_alter_table_add_column 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_alter_table_add_column completely? +

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

mysql_alter_table_add_column 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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