create_subscription

A write tool on the Mcpg MCP server.

SERVERMcpg SOURCEpypi:mcpg

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-devopam-mcpg/create-subscription.md

WHAT IT DOES

What create_subscription does on Mcpg

AI agents use create_subscription to create or update resources in Mcpg, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcpg environment.

RISK

Why create_subscription is rated Medium

The tool creates a new subscription, which modifies database state reversibly. This is a Write operation rather than Execute because it creates a specific database object rather than running arbitrary queries. Severity is medium because subscription creation can affect replication and data flow, but the operation is reversible.

From the tool's definition Tool named 'create_subscription' on a PostgreSQL MCP server. The name indicates creation of a new subscription object, which is a reversible write operation in PostgreSQL (subscriptions can be dropped/modified).

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs create_subscription 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 create_subscription, this is the rule to start with:

create_subscription Rate-limited

create_subscription 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": {
    "create_subscription": {
      "limits": [
        {
          "counter": "create_subscription_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

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

FAQ

Questions about create_subscription

What does the create_subscription tool do? +

create_subscription is a write tool on the Mcpg MCP server. It is categorised as a Write tool in the Mcpg MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_subscription? +

Register the Mcpg MCP server in PolicyLayer and add a rule for create_subscription: 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 create_subscription? +

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

Can I rate-limit create_subscription? +

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

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

create_subscription 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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