pg_ltree_convert_column

Convert an existing TEXT column to LTREE type. Note: If views depend on this column, you must drop and recreate them manually before conversion.

SERVERPostgreSQL MCP Server SOURCE@neverinfamous/postgres-mcp

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-neverinfamous-postgres-mcp/pg-ltree-convert-column.md

WHAT IT DOES

What pg_ltree_convert_column does on PostgreSQL MCP Server

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

RISK

Why pg_ltree_convert_column is rated Medium

This tool modifies database schema by altering column types, which is a reversible write operation (the column can theoretically be converted back to TEXT). However, it carries high severity due to potential data loss, dependent object failures, and broad impact on the schema. It does not delete data irreversibly (Destructive), nor does it execute arbitrary code (Execute), nor involve financial operations.

From the tool's definition Tool description states it 'Convert[s] an existing TEXT column to LTREE type,' which modifies column data types. The note about views requiring manual drop/recreation indicates schema-level modifications with side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

pg_ltree_convert_column Rate-limited

pg_ltree_convert_column 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": {
    "pg_ltree_convert_column": {
      "limits": [
        {
          "counter": "pg_ltree_convert_column_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 PostgreSQL MCP Server, apply this rule, and every pg_ltree_convert_column call is checked against it from then on.

FAQ

Questions about pg_ltree_convert_column

What does the pg_ltree_convert_column tool do? +

Convert an existing TEXT column to LTREE type. Note: If views depend on this column, you must drop and recreate them manually before conversion. It is categorised as a Write tool in the PostgreSQL MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on pg_ltree_convert_column? +

Register the PostgreSQL MCP Server MCP server in PolicyLayer and add a rule for pg_ltree_convert_column: 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 PostgreSQL MCP Server. Nothing to install.

What risk level is pg_ltree_convert_column? +

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

Can I rate-limit pg_ltree_convert_column? +

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

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

pg_ltree_convert_column is provided by the PostgreSQL MCP Server MCP server (@neverinfamous/postgres-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

What pg_ltree_convert_column does on PostgreSQL MCP Server

Why pg_ltree_convert_column is rated Medium

The rule that runs pg_ltree_convert_column safely

Questions about pg_ltree_convert_column

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