pg_dependency_graph

Get the full foreign key dependency graph with cascade paths, row counts, circular dependency detection, and severity assessment. Agent-optimized structured output.

SERVERPostgreSQL MCP Server SOURCE@neverinfamous/postgres-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-neverinfamous-postgres-mcp/pg-dependency-graph.md

WHAT IT DOES

What pg_dependency_graph does on PostgreSQL MCP Server

AI agents call pg_dependency_graph 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.

RISK

Why pg_dependency_graph is rated Low

This tool retrieves and analyzes existing database metadata (foreign key relationships, dependency paths, row counts, circular dependency detection) without creating, modifying, deleting, or executing operations. It is fundamentally a Read operation that provides structured information about database structure.

From the tool's definition Tool description states it 'Get[s] the full foreign key dependency graph' which is a retrieval/query operation. It analyzes and returns database metadata about dependencies, circular references, and row counts without modifying data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pg_dependency_graph 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_dependency_graph, this is the rule to start with:

pg_dependency_graph Allowed

pg_dependency_graph is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

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

ALLOW ONLY 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_dependency_graph call is checked against it from then on.

FAQ

Questions about pg_dependency_graph

What does the pg_dependency_graph tool do? +

Get the full foreign key dependency graph with cascade paths, row counts, circular dependency detection, and severity assessment. Agent-optimized structured output. It is categorised as a Read tool in the PostgreSQL MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on pg_dependency_graph? +

Register the PostgreSQL MCP Server MCP server in PolicyLayer and add a rule for pg_dependency_graph: 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_dependency_graph? +

pg_dependency_graph is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit pg_dependency_graph? +

Yes. Add a rate_limit block to the pg_dependency_graph 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_dependency_graph completely? +

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

pg_dependency_graph 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_dependency_graph does on PostgreSQL MCP Server

Why pg_dependency_graph is rated Low

The rule that runs pg_dependency_graph safely

Questions about pg_dependency_graph

More on PostgreSQL MCP Server, and thousands of servers like it.