List tables referencing the specified table via foreign keys.
AI agents call PostgreSQL_foreign_keys_referencing_table to retrieve information from Postgres without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries PostgreSQL metadata to retrieve information about foreign key relationships. It is a read-only operation that returns schema information without side effects. The ability to understand database structure and dependencies is diagnostic in nature, posing minimal risk if misused by an AI agent. No data is modified, deleted, or code is executed.
From the tool's definition Tool name contains 'List' operation and description states 'List tables referencing...via foreign keys' — a pure data retrieval with no modification, deletion, or execution capability.
Documented attack patterns abuse exactly the kind of access PostgreSQL_foreign_keys_referencing_table gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Postgres, and nothing reaches the server without passing your rules. This is the rule we recommend for PostgreSQL_foreign_keys_referencing_table:
{
"version": "1",
"default": "deny",
"tools": {
"PostgreSQL_foreign_keys_referencing_table": {}
}
}PostgreSQL_foreign_keys_referencing_table is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
List tables referencing the specified table via foreign keys. It is categorised as a Read tool in the Postgres MCP Server, which means it retrieves data without modifying state.
Register the Postgres MCP server in PolicyLayer and add a rule for PostgreSQL_foreign_keys_referencing_table: 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.
PostgreSQL_foreign_keys_referencing_table is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the PostgreSQL_foreign_keys_referencing_table 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.
Set action: deny in the PolicyLayer policy for PostgreSQL_foreign_keys_referencing_table. 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.
PostgreSQL_foreign_keys_referencing_table 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.
Start from Postgres, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
239 Postgres tools catalogued and risk-classified — across an index of 43,000+ MCP servers.