add_family_variant · BotUyo MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_family_variant does on BotUyo MCP Server

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

WHY IT NEEDS A POLICY

Why add_family_variant needs a policy

This tool creates or instantiates a new agent variant, which is a reversible modification operation. It materializes a draft agent (creation), falling squarely into the Write category.

From the tool's definition Tool description states 'Add a new variant to a family (materialized into a real draft agent)', indicating creation/materialization of a new agent variant.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_family_variant Rate-limited

add_family_variant 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": {
    "add_family_variant": {
      "limits": [
        {
          "counter": "add_family_variant_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 BotUyo MCP Server, so you can run agents against it safely.

FAQ

Questions about add_family_variant

What does the add_family_variant tool do? +

Add a new variant to a family (materialized into a real draft agent). Subject to the per-plan. It is categorised as a Write tool in the BotUyo 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 add_family_variant? +

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

What risk level is add_family_variant? +

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

Can I rate-limit add_family_variant? +

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

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

add_family_variant is provided by the BotUyo MCP Server MCP server (marcoar1/botuyo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.