Identify tables with data types that may affect autovacuum efficiency.
How to control PostgreSQL_non_autovacuum_friendly_datatypes ↓
AI agents call PostgreSQL_non_autovacuum_friendly_datatypes 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 retrieves and analyzes metadata about table data types to assess autovacuum performance characteristics. It performs read-only diagnostic inspection with no side effects on data or database state. No writes, deletions, code execution, or financial operations are involved. The low severity reflects that misuse only exposes informational findings about database design.
From the tool's definition Tool name and description indicate a diagnostic/analytical function: 'Identify tables' and 'may affect autovacuum efficiency' describe inspection and reporting of database characteristics without modifying data.
Documented attack patterns abuse exactly the kind of access PostgreSQL_non_autovacuum_friendly_datatypes 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_non_autovacuum_friendly_datatypes:
{
"version": "1",
"default": "deny",
"tools": {
"PostgreSQL_non_autovacuum_friendly_datatypes": {}
}
}PostgreSQL_non_autovacuum_friendly_datatypes is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Identify tables with data types that may affect autovacuum efficiency. 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_non_autovacuum_friendly_datatypes: 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_non_autovacuum_friendly_datatypes 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_non_autovacuum_friendly_datatypes 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_non_autovacuum_friendly_datatypes. 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_non_autovacuum_friendly_datatypes 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.