insert_record · Supabase NextJS MCP Server MCP

WHAT IT DOES

What insert_record does on Supabase NextJS MCP Server

AI agents use insert_record to create or update resources in Supabase NextJS MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Supabase NextJS MCP Server environment.

WHY IT NEEDS A POLICY

Why insert_record needs a policy

An AI agent can call insert_record faster than any human can review — one bad instruction and it creates or modifies resources in Supabase NextJS MCP Server by the hundred, each call as confident as the last.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

insert_record Rate-limited

insert_record stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "insert_record": {
      "limits": [
        {
          "counter": "insert_record_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about insert_record

What does the insert_record tool do? +

Insert a record into Supabase. It is categorised as a Write tool in the Supabase NextJS MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on insert_record? +

Register the Supabase NextJS MCP Server MCP server in PolicyLayer and add a rule for insert_record: 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 Supabase NextJS MCP Server. Nothing to install.

What risk level is insert_record? +

insert_record is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit insert_record? +

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

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

insert_record is provided by the Supabase NextJS MCP Server MCP server (tengfone/supabase-nextjs-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.