Detect large numbers of orphaned prepared transactions that need cleanup.
AI agents call PostgreSQL_orphaned_prepared_transactions 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 tool queries PostgreSQL's prepared transaction state to identify orphaned transactions (those in PREPARED state without corresponding connections or coordinators). It performs a diagnostic read of system metadata.
From the tool's definition Tool name and description indicate 'Detect' and 'cleanup' need assessment. The verb 'Detect' is a read operation that queries PostgreSQL system catalogs to identify orphaned prepared transactions without modifying or deleting them.
Documented attack patterns abuse exactly the kind of access PostgreSQL_orphaned_prepared_transactions 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_orphaned_prepared_transactions:
{
"version": "1",
"default": "deny",
"tools": {
"PostgreSQL_orphaned_prepared_transactions": {}
}
}PostgreSQL_orphaned_prepared_transactions is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Detect large numbers of orphaned prepared transactions that need cleanup. 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_orphaned_prepared_transactions: 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_orphaned_prepared_transactions 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_orphaned_prepared_transactions 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_orphaned_prepared_transactions. 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_orphaned_prepared_transactions 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.