get_postgresql_config

THE RISK

Low Risk

Why get_postgresql_config needs a policy

This tool retrieves PostgreSQL configuration information, which is a read-only operation. Listing configuration parameters has no side effects, does not execute commands, does not modify data, and does not involve financial transactions. The low severity reflects minimal risk even if queried inappropriately, as configuration inspection alone cannot damage systems or data.

From the tool's definition Tool name and description indicate 'List PostgreSQL advanced configuration parameters' - a query operation that retrieves configuration data without modification or side effects.

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

POLICY

How to control get_postgresql_config

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_postgresql_config": {}
  }
}

get_postgresql_config is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Linode 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.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 416 Linode MCP Server tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_postgresql_config

What does the get_postgresql_config tool do? +

List PostgreSQL advanced configuration parameters. It is categorised as a Read tool in the Linode MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_postgresql_config? +

Register the Linode MCP Server MCP server in PolicyLayer and add a rule for get_postgresql_config: 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 Linode MCP Server. Nothing to install.

What risk level is get_postgresql_config? +

get_postgresql_config is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_postgresql_config? +

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

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

get_postgresql_config is provided by the Linode MCP Server MCP server (takashito/linode-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 Linode MCP Server tool call.

Start from Linode 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 →