postgres_execute_query · MCP Server Project MCP

WHAT IT DOES

What postgres_execute_query does on MCP Server Project

AI agents invoke postgres_execute_query to trigger actions in MCP Server Project. 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 IT NEEDS A POLICY

Why postgres_execute_query needs a policy

A tool that executes arbitrary PostgreSQL queries can run any SQL command including SELECT, INSERT, UPDATE, DELETE, or DROP statements. The severity is critical because: (1) with sibling introspection tools, an AI agent can discover schema and craft destructive commands; (2) SQL execution without constraints can corrupt, exfiltrate, or destroy data; (3) depending on database permissions and contents, financial or…

From the tool's definition Tool name 'postgres_execute_query' indicates arbitrary SQL query execution. Combined with sibling tools that describe and list tables, this tool pattern enables unrestricted database operations. Empty description increases risk assessment.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

postgres_execute_query Rate-limited

postgres_execute_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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "postgres_execute_query": {
      "limits": [
        {
          "counter": "postgres_execute_query_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MCP Server Project, so you can run agents against it safely.

FAQ

Questions about postgres_execute_query

What does the postgres_execute_query tool do? +

postgres_execute_query. It is categorised as a Execute tool in the MCP Server Project MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on postgres_execute_query? +

Register the MCP Server Project MCP server in PolicyLayer and add a rule for postgres_execute_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 MCP Server Project. Nothing to install.

What risk level is postgres_execute_query? +

postgres_execute_query is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit postgres_execute_query? +

Yes. Add a rate_limit block to the postgres_execute_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.

How do I block postgres_execute_query completely? +

Set action: deny in the PolicyLayer policy for postgres_execute_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.

What MCP server provides postgres_execute_query? +

postgres_execute_query is provided by the MCP Server Project MCP server (jamesunlocked/mcp_projects). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.