insert_kb · MindsDB MySQL MCP Server MCP: Risk & Policy

WHAT IT DOES

What insert_kb does on MindsDB MySQL MCP Server

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

WHY IT NEEDS A POLICY

Why insert_kb needs a policy

The tool inserts (creates/adds) data into a knowledge base, which is a Write operation—it modifies data but does not delete, execute arbitrary code, or move money. The batch processing capability and integration with source queries present a medium severity due to potential for bulk data injection, but this remains a reversible write operation.

From the tool's definition Tool name 'insert_kb' and description 'Insert data into a knowledge base from a source query' indicates creating/adding data to a knowledge base. This is a write operation that modifies data reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

insert_kb Rate-limited

insert_kb 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_kb": {
      "limits": [
        {
          "counter": "insert_kb_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 MindsDB MySQL MCP Server, so you can run agents against it safely.

FAQ

Questions about insert_kb

What does the insert_kb tool do? +

Insert data into a knowledge base from a source query. Supports batch processing. It is categorised as a Write tool in the MindsDB MySQL 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_kb? +

Register the MindsDB MySQL MCP Server MCP server in PolicyLayer and add a rule for insert_kb: 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 MindsDB MySQL MCP Server. Nothing to install.

What risk level is insert_kb? +

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

Can I rate-limit insert_kb? +

Yes. Add a rate_limit block to the insert_kb 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_kb completely? +

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

insert_kb is provided by the MindsDB MySQL MCP Server MCP server (nikhgupta/mindsdb-mysql-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.