Get comprehensive index usage statistics to identify unused or underutilized indexes.
AI agents call PostgreSQL_get_index_usage_stats 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 and retrieves statistical information about PostgreSQL index usage. It has no side effects, does not modify database structure or data, does not execute arbitrary commands, and does not delete anything. It falls squarely into the Read category as a data retrieval and diagnostic operation. Severity is low because misuse would only expose performance metrics without operational risk.
From the tool's definition Tool name contains 'get' and description states it retrieves 'index usage statistics' to 'identify' patterns. No modification, deletion, or execution of code is mentioned. The operation is purely observational and diagnostic.
Documented attack patterns abuse exactly the kind of access PostgreSQL_get_index_usage_stats 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_index_usage_stats:
{
"version": "1",
"default": "deny",
"tools": {
"PostgreSQL_get_index_usage_stats": {}
}
}PostgreSQL_get_index_usage_stats is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get comprehensive index usage statistics to identify unused or underutilized indexes. 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_index_usage_stats: 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_index_usage_stats 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_index_usage_stats 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_index_usage_stats. 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_index_usage_stats 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.