PostgreSQL_kill_connection
Terminate a specific database connection by PID.
This record as markdown: /tools/mukul975-postgres-mcp-server/postgresql-kill-connection.md
What PostgreSQL_kill_connection does on Postgres
AI agents invoke PostgreSQL_kill_connection 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_kill_connection is rated High
Killing a database connection forcibly terminates an active session, which is an external operation with immediate side effects (dropping the connection, potentially aborting in-flight transactions). While not permanently destructive to data, it is an irreversible action against a running process and can cause cascading failures (e.g., application errors, transaction rollbacks).
From the tool's definition "Terminate a specific database connection by PID"
Attacks that exploit this kind of access
The rule that runs PostgreSQL_kill_connection 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_kill_connection, this is the rule to start with:
PostgreSQL_kill_connection 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_kill_connection call is checked against it from then on.
Questions about PostgreSQL_kill_connection
Terminate a specific database connection by PID. 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_kill_connection: 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_kill_connection 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_kill_connection 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_kill_connection. 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_kill_connection 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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