pg_jsonb_validate_path

Validate a JSONPath expression and test it against sample data. Supports vars for parameterized paths.

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-jsonb-validate-path.md

WHAT IT DOES

What pg_jsonb_validate_path does on PostgreSQL MCP Server

AI agents call pg_jsonb_validate_path 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_jsonb_validate_path is rated Low

This tool validates and tests JSONPath expressions against sample data. It performs no modifications, deletions, or financial operations—it only queries and validates data structures. The operation is read-only with no side effects, fitting the Read category.

From the tool's definition Validate a JSONPath expression and test it against sample data. Supports vars for parameterized paths.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pg_jsonb_validate_path 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_jsonb_validate_path, this is the rule to start with:

pg_jsonb_validate_path Allowed

pg_jsonb_validate_path 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_jsonb_validate_path": {}
  }
}

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_jsonb_validate_path call is checked against it from then on.

FAQ

Questions about pg_jsonb_validate_path

What does the pg_jsonb_validate_path tool do? +

Validate a JSONPath expression and test it against sample data. Supports vars for parameterized paths. 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_jsonb_validate_path? +

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

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

Can I rate-limit pg_jsonb_validate_path? +

Yes. Add a rate_limit block to the pg_jsonb_validate_path 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_jsonb_validate_path completely? +

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

pg_jsonb_validate_path 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_jsonb_validate_path does on PostgreSQL MCP Server

Why pg_jsonb_validate_path is rated Low

The rule that runs pg_jsonb_validate_path safely

Questions about pg_jsonb_validate_path

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