create_publication

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-publication.md

WHAT IT DOES

What create_publication does on Mcpg

AI agents use create_publication 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_publication is rated Medium

This is a Write operation because it creates a new database object (publication) that can be modified or deleted later. It's not Destructive because publications can be dropped and recreated. Severity is medium because creating unwanted publications could enable unauthorized data replication or logical replication streams, but the impact is containable through schema management.

From the tool's definition Tool named 'create_publication' on a PostgreSQL MCP server. In PostgreSQL, CREATE PUBLICATION is a DDL command that creates a new logical replication publication, modifying database schema and configuration.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

create_publication Rate-limited

create_publication 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_publication": {
      "limits": [
        {
          "counter": "create_publication_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_publication call is checked against it from then on.

FAQ

Questions about create_publication

What does the create_publication tool do? +

create_publication 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_publication? +

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

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

Can I rate-limit create_publication? +

Yes. Add a rate_limit block to the create_publication 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_publication completely? +

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

create_publication 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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