get_postgresql_credentials

Get credentials for a PostgreSQL database instance

SERVERLinode MCP Server SOURCEtakashito/linode-mcp-server

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/takashito-linode-mcp-server/get-postgresql-credentials.md

WHAT IT DOES

What get_postgresql_credentials does on Linode MCP Server

AI agents call get_postgresql_credentials to retrieve information from Linode MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_postgresql_credentials is rated Low

This tool retrieves database credentials—a read operation that queries/fetches information without side effects. While credentials are sensitive, the tool itself performs no write, destructive, execute, or financial operations. Access control and secret masking should be managed separately at the authentication/authorization layer.

From the tool's definition Tool name 'get_postgresql_credentials' and description 'Get credentials for a PostgreSQL database instance' indicate retrieval of existing credentials with no modification or deletion of data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_postgresql_credentials safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Linode MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_postgresql_credentials, this is the rule to start with:

get_postgresql_credentials Allowed

get_postgresql_credentials is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Linode MCP Server, apply this rule, and every get_postgresql_credentials call is checked against it from then on.

FAQ

Questions about get_postgresql_credentials

What does the get_postgresql_credentials tool do? +

Get credentials for a PostgreSQL database instance. 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_credentials? +

Register the Linode MCP Server MCP server in PolicyLayer and add a rule for get_postgresql_credentials: 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_credentials? +

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

Can I rate-limit get_postgresql_credentials? +

Yes. Add a rate_limit block to the get_postgresql_credentials 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_credentials completely? +

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

get_postgresql_credentials 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.

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