list_subscriptions

List logical-replication subscriptions; requires superuser to see any rows.

SERVERMcpg SOURCEpypi:mcpg

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/io-github-devopam-mcpg/list-subscriptions.md

WHAT IT DOES

What list_subscriptions does on Mcpg

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

RISK

Why list_subscriptions is rated Low

This tool retrieves information about PostgreSQL logical-replication subscriptions. It performs a read-only query and returns existing data without modification, creation, or deletion. The superuser permission requirement is a standard access control mechanism and does not change the fundamental nature of the operation as a read.

From the tool's definition Tool name 'list_subscriptions' and description 'List logical-replication subscriptions' indicate a query/retrieval operation with no side effects.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs list_subscriptions safely

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

list_subscriptions Allowed

list_subscriptions 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": {
    "list_subscriptions": {}
  }
}

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

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

FAQ

Questions about list_subscriptions

What does the list_subscriptions tool do? +

List logical-replication subscriptions; requires superuser to see any rows. It is categorised as a Read tool in the Mcpg MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_subscriptions? +

Register the Mcpg MCP server in PolicyLayer and add a rule for list_subscriptions: 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 Mcpg. Nothing to install.

What risk level is list_subscriptions? +

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

Can I rate-limit list_subscriptions? +

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

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

list_subscriptions is provided by the Mcpg MCP server (pypi:mcpg). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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