mysql_json_array_append

Append a value to a JSON array at the specified path.

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

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/io-github-neverinfamous-mysql-mcp/mysql-json-array-append.md

WHAT IT DOES

What mysql_json_array_append does on Mysql Mcp

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

RISK

Why mysql_json_array_append is rated Medium

This tool modifies existing JSON data by appending values to a JSON array in MySQL. It creates or modifies data in a reversible manner (the append can be undone), placing it in the Write category. Severity is medium as it can modify database records but is not irreversible.

From the tool's definition Append a value to a JSON array at the specified path

Attacks that exploit this kind of access

RECOMMENDED RULE

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

mysql_json_array_append Rate-limited

mysql_json_array_append 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_json_array_append": {
      "limits": [
        {
          "counter": "mysql_json_array_append_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 Mcp, apply this rule, and every mysql_json_array_append call is checked against it from then on.

FAQ

Questions about mysql_json_array_append

What does the mysql_json_array_append tool do? +

Append a value to a JSON array at the specified path. It is categorised as a Write tool in the Mysql Mcp 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_json_array_append? +

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

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

Can I rate-limit mysql_json_array_append? +

Yes. Add a rate_limit block to the mysql_json_array_append 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_json_array_append completely? +

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

mysql_json_array_append 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.

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