Detect queries that hold locks conflicting with multiple other queries.
AI agents call PostgreSQL_detect_conflicting_queries to retrieve information from Postgres without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a diagnostic/monitoring tool that identifies existing lock conflicts by reading database metadata and internal state (lock tables, query status). It does not execute arbitrary code, modify data, delete anything, or trigger financial transactions. While lock analysis could indirectly reveal performance problems, the tool itself performs observation and analysis only.
From the tool's definition Tool detects and analyzes queries that hold locks and their conflicts with other queries. The description indicates it performs diagnostic inspection ('detect', 'analyze') of lock conflicts without modifying or deleting data, without executing arbitrary…
Documented attack patterns abuse exactly the kind of access PostgreSQL_detect_conflicting_queries gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Postgres, and nothing reaches the server without passing your rules. This is the rule we recommend for PostgreSQL_detect_conflicting_queries:
{
"version": "1",
"default": "deny",
"tools": {
"PostgreSQL_detect_conflicting_queries": {}
}
}PostgreSQL_detect_conflicting_queries is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Detect queries that hold locks conflicting with multiple other queries. It is categorised as a Read tool in the Postgres MCP Server, which means it retrieves data without modifying state.
Register the Postgres MCP server in PolicyLayer and add a rule for PostgreSQL_detect_conflicting_queries: 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_detect_conflicting_queries 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 PostgreSQL_detect_conflicting_queries 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_detect_conflicting_queries. 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_detect_conflicting_queries 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.
Start from Postgres, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
239 Postgres tools catalogued and risk-classified — across an index of 43,000+ MCP servers.