Analyze database growth patterns over time using pg_stat_database.
AI agents call PostgreSQL_get_database_growth_trend 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 statistical information about database growth metrics from PostgreSQL's built-in monitoring views. It has no side effects and cannot modify data, execute arbitrary code, or cause destructive operations. The blast radius of misuse is minimal — an attacker could only gain visibility into database size trends, which is informational only.
From the tool's definition Tool description states 'Analyze database growth patterns over time using pg_stat_database' — this accesses the pg_stat_database system catalog view which provides read-only statistics.
Documented attack patterns abuse exactly the kind of access PostgreSQL_get_database_growth_trend 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_get_database_growth_trend:
{
"version": "1",
"default": "deny",
"tools": {
"PostgreSQL_get_database_growth_trend": {}
}
}PostgreSQL_get_database_growth_trend is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Analyze database growth patterns over time using pg_stat_database. 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_get_database_growth_trend: 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_get_database_growth_trend 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_get_database_growth_trend 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_get_database_growth_trend. 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_get_database_growth_trend 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.