add-connection · Mysql Multi MCP: Risk & Policy

WHAT IT DOES

What add-connection does on Mysql Multi

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

WHY IT NEEDS A POLICY

Why add-connection needs a policy

This tool creates a new configuration entry (a database connection definition) that can be persisted. While it doesn't directly query or execute against a database, it modifies the server's connection configuration state reversibly.

From the tool's definition Tool description states 'Add a new named database connection to the config' — this creates/modifies configuration by adding a new connection entry.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add-connection Rate-limited

add-connection 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": {
    "add-connection": {
      "limits": [
        {
          "counter": "add-connection_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mysql Multi, so you can run agents against it safely.

FAQ

Questions about add-connection

What does the add-connection tool do? +

Add a new named database connection to the config. It is categorised as a Write tool in the Mysql Multi MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add-connection? +

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

What risk level is add-connection? +

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

Can I rate-limit add-connection? +

Yes. Add a rate_limit block to the add-connection 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 add-connection completely? +

Set action: deny in the PolicyLayer policy for add-connection. 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 add-connection? +

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