pg_text_to_query
Convert text to tsquery for full-text search. Modes: plain (default), phrase (proximity matching), websearch (Google-like syntax with AND/OR/-).
This record as markdown: /tools/io-github-neverinfamous-postgres-mcp/pg-text-to-query.md
What pg_text_to_query does on PostgreSQL MCP Server
AI agents call pg_text_to_query 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_text_to_query is rated Low
pg_text_to_query performs query transformation for full-text search—a read-only operation that retrieves or prepares search queries without side effects. It does not modify, delete, or execute arbitrary operations. The tool accepts user input but constrains it to converting text into a standardized query format (tsquery), which is a safe, bounded operation.
From the tool's definition Tool converts text to tsquery for full-text search with modes like 'plain', 'phrase', and 'websearch'. This is a data retrieval operation (search) with no mention of modification, deletion, or execution of arbitrary code.
Attacks that exploit this kind of access
The rule that runs pg_text_to_query 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_text_to_query, this is the rule to start with:
pg_text_to_query 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_text_to_query call is checked against it from then on.
Questions about pg_text_to_query
Convert text to tsquery for full-text search. Modes: plain (default), phrase (proximity matching), websearch (Google-like syntax with AND/OR/-). 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_text_to_query: 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_text_to_query 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_text_to_query 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_text_to_query. 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_text_to_query 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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