Analyze dead tuples per index for vacuum optimization.
AI agents call PostgreSQL_index_dead_tuples_analysis 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 is a diagnostic/monitoring tool that reads performance metrics from PostgreSQL's internal state. It retrieves information about dead tuples (vacuumed rows) to inform optimization decisions, but does not execute commands, modify data, or trigger side effects. It belongs in the Read category. Severity is low because misuse only provides diagnostic information that could inform poor decisions, not direct harm.
From the tool's definition Tool name contains 'analysis' and description states 'Analyze dead tuples per index' — the verb 'analyze' and 'for vacuum optimization' indicate this tool queries PostgreSQL system catalogs to retrieve diagnostic information about index fragmentation.
Documented attack patterns abuse exactly the kind of access PostgreSQL_index_dead_tuples_analysis 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_index_dead_tuples_analysis:
{
"version": "1",
"default": "deny",
"tools": {
"PostgreSQL_index_dead_tuples_analysis": {}
}
}PostgreSQL_index_dead_tuples_analysis is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Analyze dead tuples per index for vacuum optimization. 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_index_dead_tuples_analysis: 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_index_dead_tuples_analysis 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_index_dead_tuples_analysis 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_index_dead_tuples_analysis. 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_index_dead_tuples_analysis 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.
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239 Postgres tools catalogued and risk-classified — across an index of 43,000+ MCP servers.