PostgreSQL_execute_select_query
Execute a SELECT query and return results.
This record as markdown: /tools/mukul975-postgres-mcp-server/postgresql-execute-select-query.md
What PostgreSQL_execute_select_query does on Postgres
AI agents invoke PostgreSQL_execute_select_query to trigger actions in Postgres. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why PostgreSQL_execute_select_query is rated High
Although SELECT queries are read-only and typically safe, this tool allows arbitrary query execution. A malicious or poorly-constructed SELECT could consume excessive resources (denial of service), exploit PostgreSQL extensions with side effects, or trigger unintended logic via database functions embedded in queries.
From the tool's definition Tool name contains 'execute_select_query' and description states 'Execute a SELECT query and return results.' The verb 'Execute' combined with 'query' indicates code execution.
Attacks that exploit this kind of access
The rule that runs PostgreSQL_execute_select_query safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Postgres, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For PostgreSQL_execute_select_query, this is the rule to start with:
PostgreSQL_execute_select_query stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Postgres, apply this rule, and every PostgreSQL_execute_select_query call is checked against it from then on.
Questions about PostgreSQL_execute_select_query
Execute a SELECT query and return results. It is categorised as a Execute tool in the Postgres MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Postgres MCP server in PolicyLayer and add a rule for PostgreSQL_execute_select_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 Postgres. Nothing to install.
PostgreSQL_execute_select_query is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the PostgreSQL_execute_select_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 PostgreSQL_execute_select_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.
PostgreSQL_execute_select_query 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.
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