Analyze index health across a schema. Reports unused indexes (zero scans), duplicate indexes, and tables that might benefit from additional indexes based on sequential scan counts. Helps optimize storage and query performance.
AI agents call indexHealth to retrieve information from Postgresql without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
indexHealth retrieves and analyzes existing database metadata to provide optimization recommendations. It queries system catalogs (pg_stat_user_indexes, pg_indexes, etc.) but makes no changes to schema, data, or configuration. No side effects occur.
From the tool's definition Tool performs analysis and reporting of index metrics (zero scans, duplicate indexes, sequential scan counts) with no modification, deletion, or execution capabilities. Verbs: 'Analyze', 'Reports', 'Helps optimize' indicate read-only diagnostic operations.
Attacks that exploit this kind of access
Analyze index health across a schema. Reports unused indexes (zero scans), duplicate indexes, and tables that might benefit from additional indexes based on sequential scan counts. Helps optimize storage and query performance. It is categorised as a Read tool in the Postgresql MCP Server, which means it retrieves data without modifying state.
Register the Postgresql MCP server in PolicyLayer and add a rule for indexHealth: 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 Postgresql. Nothing to install.
indexHealth 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 indexHealth 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 indexHealth. 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.
indexHealth is provided by the Postgresql MCP server (vnikhilbuddhavarapu/postgresql-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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