connect_to_database

THE RISK

High Risk

Why connect_to_database needs a policy

This tool initiates a connection to an RDS SQL Server instance and stores it internally, which is an external operation with side effects (establishing a live database session, persisting credentials/state). It is not purely reading data — it creates a stateful connection that enables subsequent operations.

From the tool's definition 'Connect to a SQL Server RDS instance and save the connection internally' — establishes an active database connection and persists it in internal state

Documented attack patterns abuse exactly the kind of access connect_to_database gives an agent:

POLICY

How to control connect_to_database

PolicyLayer is an MCP gateway — it sits between your AI agents and Prometheus MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for connect_to_database:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "connect_to_database": {
      "limits": [
        {
          "counter": "connect_to_database_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

connect_to_database stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Prometheus MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

High-risk tools in Prometheus MCP Server → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about connect_to_database

What does the connect_to_database tool do? +

Connect to a SQL Server RDS instance and save the connection internally. It is categorised as a Execute tool in the Prometheus MCP Server MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on connect_to_database? +

Register the Prometheus MCP Server MCP server in PolicyLayer and add a rule for connect_to_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 Prometheus MCP Server. Nothing to install.

What risk level is connect_to_database? +

connect_to_database is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit connect_to_database? +

Yes. Add a rate_limit block to the connect_to_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_to_database completely? +

Set action: deny in the PolicyLayer policy for connect_to_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_to_database? +

connect_to_database is provided by the Prometheus MCP Server MCP server (awslabs.prometheus-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Prometheus MCP Server tool call.

Start from Prometheus MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →