connect_database · Multi-Database SQL MCP Server MCP

WHAT IT DOES

What connect_database does on Multi-Database SQL MCP Server

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

WHY IT NEEDS A POLICY

Why connect_database needs a policy

Connecting to a database creates a new persistent connection resource (state side effect) but does not read, modify, or destroy data. It is reversible via disconnect_database. The primary risk is that a malicious agent could connect to unintended or sensitive database endpoints, but no data is read or written by this action alone.

From the tool's definition 'Connect to a database' — establishes a new connection/session to an external database system

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

connect_database Rate-limited

connect_database 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": {
    "connect_database": {
      "limits": [
        {
          "counter": "connect_database_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 Multi-Database SQL MCP Server, so you can run agents against it safely.

FAQ

Questions about connect_database

What does the connect_database tool do? +

Connect to a database (SQLite, MySQL, PostgreSQL, or SQL Server). It is categorised as a Write tool in the Multi-Database SQL MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on connect_database? +

Register the Multi-Database SQL MCP Server MCP server in PolicyLayer and add a rule for connect_database: 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 Multi-Database SQL MCP Server. Nothing to install.

What risk level is connect_database? +

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

Can I rate-limit connect_database? +

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

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

connect_database is provided by the Multi-Database SQL MCP Server MCP server (soumya7681/sql-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.