pg_ltree_lca

What pg_ltree_lca does on PostgreSQL MCP Server

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

Why pg_ltree_lca is rated Low

This tool performs a computational query on ltree (PostgreSQL's hierarchical tree data type) to find common ancestor nodes. It has no side effects—it does not create, modify, delete, or execute arbitrary operations. It purely retrieves or derives information from existing data, fitting the Read category. Severity is low because misuse cannot cause data loss, financial harm, or unintended system modifications.

From the tool's definition Tool name 'pg_ltree_lca' and description 'Find the longest common ancestor of multiple ltree paths' indicates a query operation that retrieves/computes information about existing hierarchical data without modifying it.

The rule that runs pg_ltree_lca safely

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

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

Questions about pg_ltree_lca