PostgreSQL_get_foreign_tables

Get information about foreign tables and foreign data wrappers.

SERVERPostgres SOURCEmukul975/postgres-mcp-server

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/mukul975-postgres-mcp-server/postgresql-get-foreign-tables.md

WHAT IT DOES

What PostgreSQL_get_foreign_tables does on Postgres

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

RISK

Why PostgreSQL_get_foreign_tables is rated Low

This tool retrieves metadata about foreign tables and foreign data wrappers without querying, modifying, or deleting any data. It performs a read-only information lookup operation. Even in a PostgreSQL database context with 200+ specialized tools, this specific tool is purely informational.

From the tool's definition Tool name includes 'get', and description states 'Get information about foreign tables and foreign data wrappers' — these are retrieval operations with no modification of data.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs PostgreSQL_get_foreign_tables safely

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

PostgreSQL_get_foreign_tables Allowed

PostgreSQL_get_foreign_tables 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": {
    "PostgreSQL_get_foreign_tables": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Postgres, apply this rule, and every PostgreSQL_get_foreign_tables call is checked against it from then on.

FAQ

Questions about PostgreSQL_get_foreign_tables

What does the PostgreSQL_get_foreign_tables tool do? +

Get information about foreign tables and foreign data wrappers. It is categorised as a Read tool in the Postgres MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on PostgreSQL_get_foreign_tables? +

Register the Postgres MCP server in PolicyLayer and add a rule for PostgreSQL_get_foreign_tables: 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 Postgres. Nothing to install.

What risk level is PostgreSQL_get_foreign_tables? +

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

Can I rate-limit PostgreSQL_get_foreign_tables? +

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

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

PostgreSQL_get_foreign_tables is provided by the Postgres MCP server (mukul975/postgres-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

What PostgreSQL_get_foreign_tables does on Postgres

Why PostgreSQL_get_foreign_tables is rated Low

The rule that runs PostgreSQL_get_foreign_tables safely

Questions about PostgreSQL_get_foreign_tables

More on Postgres, and thousands of servers like it.