Understand Your PostgreSQL Database Structure: Schema Discovery Tools
Before you write queries or make changes, you need to know what you're working with. What tables exist? How are they connected? What depends on what?
The Schema Discovery MCP server bundle answers these questions. Ten MCP tools for discovering tables, mapping relationships, tracking dependencies, and documenting schemas. It's like having a map of your database before you start exploring.
The Problem This Solves
You're looking at a database you've never seen before. Or maybe you built it months ago and forgot how everything connects. You need to understand the structure before you can do anything useful.
This bundle gives you the MCP tools to figure it out: list all tables with metadata, inspect table schemas in detail, map foreign key relationships, track dependencies, find unused tables. Everything you need to understand what's going on.
Discovering Tables and Their Structure
First things first: what tables exist? What columns do they have? What types? What constraints?
The MCP tools list all tables with metadata, columns, and relationships. See what's in your database at a glance. Inspect table schemas in detail—columns, types, constraints, indexes. Understand the structure before writing queries.
You also get compact schema overviews designed for AI context. These help AI agents understand your database structure so they can write better queries and make smarter suggestions.
Example: "Show me the database schema and relationships." The AI lists all tables, inspects schemas, maps relationships, provides a complete picture.
Mapping Foreign Key Relationships
Tables don't exist in isolation. They connect. Which tables reference which? What are the foreign key relationships?
The MCP tools visualize foreign key relationships as a graph. See how tables connect. Understand the data model at a glance instead of tracing foreign keys manually.
Ask "Show me how tables are related" and you'll get a relationship graph showing all foreign key connections.
Tracking Dependencies Before You Break Something
This is important: what depends on a table before you change or delete it? What views reference it? What triggers? What functions?
The MCP tools show what views, triggers, and functions depend on each table. Know what breaks if you change something. Check dependencies before making changes.
Real scenario: you want to modify the users table. Check dependencies first. See what views, triggers, and functions reference users. Know what you're affecting.
Ask "What depends on the users table?" and you'll see all views, triggers, and functions that reference it.
Finding Unused Tables
Orphaned tables clutter your database. They're not referenced by views, triggers, functions, or foreign keys. Might be safe to remove—but you need to know first.
The MCP tools find unused tables that aren't referenced anywhere. Clean up safely. Check if they're referenced, remove them if they're safe to delete.
Ask "Are there any unused tables I can remove?" and the AI finds orphaned tables, checks dependencies, shows you what's safe to remove.
Discovering Stored Procedures and Functions
What automation already exists? What stored procedures and functions are in place?
The MCP tools list all stored procedures and functions with their definitions. Understand what database automation exists so you don't reinvent the wheel.
Ask "What stored procedures exist?" and you'll get a list of all functions, their definitions, and explanations of what they do.
How AI Uses This Bundle
When you ask "Show me the database schema and relationships," the AI loads the Schema Discovery MCP server bundle, uses MCP tools to list all tables, inspects schemas, maps foreign key relationships, shows dependencies, provides a schema overview.
Ask "What depends on the users table?" and it checks views, triggers, and functions, finds all dependencies, shows you what references users.
Want to find unused tables? "Are there any unused tables I can remove?" triggers a search for orphaned tables, dependency checks, shows you what's safe to remove.
Getting Started
Enable the Schema Discovery MCP server bundle in your MCPBundles account. Connect your PostgreSQL database (host, port, database, user, password—one-time setup). Then start asking schema questions. The AI automatically uses the right MCP tools based on what you ask.
Want more? Check out the Data Exploration MCP Server Bundle for browsing and searching data, the Development & Operations MCP Server Bundle for making schema changes, or the Main PostgreSQL MCP Server Bundle for all 38 MCP tools.
Enable the Schema Discovery MCP server bundle and start understanding your database structure.