list_available_extensions

What list_available_extensions does on Mcpg

AI agents call list_available_extensions 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.

Why list_available_extensions is rated Low

This is a passive information retrieval tool that queries what extensions are available in the PostgreSQL server. It performs no writes, deletions, or external operations. The tool name follows the 'list' pattern typical of Read operations. Low severity because even if misused, it only exposes metadata about available extensions, which is generally non-sensitive configuration information.

From the tool's definition Tool name 'list_available_extensions' indicates a listing/query operation with no side effects. The tool retrieves information about available PostgreSQL extensions without modifying any data.

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

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

Questions about list_available_extensions