pg_citext_analyze_candidates
Find TEXT columns that may benefit from case-insensitive comparisons. Looks for common patterns like email, username, name, slug, etc.
This record as markdown: /tools/io-github-neverinfamous-postgres-mcp/pg-citext-analyze-candidates.md
What pg_citext_analyze_candidates does on PostgreSQL MCP Server
AI agents call pg_citext_analyze_candidates to retrieve information from PostgreSQL MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why pg_citext_analyze_candidates is rated Low
This tool performs read-only analysis of database schema to identify candidate columns for potential optimization. It scans for naming patterns and returns findings, with no side effects, data modification, or execution of external operations. The action is introspective and advisory in nature.
From the tool's definition Tool description states it 'Find[s] TEXT columns' and 'Looks for common patterns' — purely analytical operations that retrieve or query data about schema without modifying anything.
Attacks that exploit this kind of access
The rule that runs pg_citext_analyze_candidates safely
PolicyLayer is an MCP gateway: it sits between your AI agents and PostgreSQL MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For pg_citext_analyze_candidates, this is the rule to start with:
pg_citext_analyze_candidates is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect PostgreSQL MCP Server, apply this rule, and every pg_citext_analyze_candidates call is checked against it from then on.
Questions about pg_citext_analyze_candidates
Find TEXT columns that may benefit from case-insensitive comparisons. Looks for common patterns like email, username, name, slug, etc. It is categorised as a Read tool in the PostgreSQL MCP Server MCP Server, which means it retrieves data without modifying state.
Register the PostgreSQL MCP Server MCP server in PolicyLayer and add a rule for pg_citext_analyze_candidates: 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 MCP Server. Nothing to install.
pg_citext_analyze_candidates 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 pg_citext_analyze_candidates 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 pg_citext_analyze_candidates. 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.
pg_citext_analyze_candidates is provided by the PostgreSQL MCP Server MCP server (@neverinfamous/postgres-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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