pg_kcache_reset

Reset pg_stat_kcache statistics. Use this to start fresh measurements. Note: This also resets pg_stat_statements statistics.

SERVERPostgreSQL MCP Server SOURCE@neverinfamous/postgres-mcp

Critical RISK CLASS

Category Destructive

Parameters 00 required

Recommended Hiddensee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-neverinfamous-postgres-mcp/pg-kcache-reset.md

WHAT IT DOES

What pg_kcache_reset does on PostgreSQL MCP Server

AI agents call pg_kcache_reset to permanently remove resources in PostgreSQL MCP Server, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

RISK

Why pg_kcache_reset is rated Critical

Resetting statistics is irreversible; the historical measurement data is permanently lost. It also has a side effect of resetting pg_stat_statements, widening the blast radius. No data rows are deleted but operational observability data is wiped, which qualifies as destructive/irreversible action.

From the tool's definition 'Reset pg_stat_kcache statistics' and 'This also resets pg_stat_statements statistics' — permanently clears accumulated statistics data

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pg_kcache_reset safely

PolicyLayer is an MCP gateway: it sits between your AI agents and PostgreSQL MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For pg_kcache_reset, this is the rule to start with:

pg_kcache_reset Hidden

pg_kcache_reset is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "pg_kcache_reset"
  ]
}

RESTRICT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect PostgreSQL MCP Server, apply this rule, and every pg_kcache_reset call is checked against it from then on.

FAQ

Questions about pg_kcache_reset

What does the pg_kcache_reset tool do? +

Reset pg_stat_kcache statistics. Use this to start fresh measurements. Note: This also resets pg_stat_statements statistics. It is categorised as a Destructive tool in the PostgreSQL MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on pg_kcache_reset? +

Register the PostgreSQL MCP Server MCP server in PolicyLayer and add a rule for pg_kcache_reset: 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 PostgreSQL MCP Server. Nothing to install.

What risk level is pg_kcache_reset? +

pg_kcache_reset is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit pg_kcache_reset? +

Yes. Add a rate_limit block to the pg_kcache_reset 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 pg_kcache_reset completely? +

Set action: deny in the PolicyLayer policy for pg_kcache_reset. 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 pg_kcache_reset? +

pg_kcache_reset is provided by the PostgreSQL MCP Server MCP server (@neverinfamous/postgres-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

What pg_kcache_reset does on PostgreSQL MCP Server

Why pg_kcache_reset is rated Critical

The rule that runs pg_kcache_reset safely

Questions about pg_kcache_reset

More on PostgreSQL MCP Server, and thousands of servers like it.