set_brand · AI-Canvas MCP Server MCP: Risk & Policy

WHAT IT DOES

What set_brand does on AI-Canvas MCP Server

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

WHY IT NEEDS A POLICY

Why set_brand needs a policy

This tool creates or modifies brand identity metadata reversibly within a design document. It does not execute code, delete data irreversibly, or move money. However, it could have medium severity if an AI agent incorrectly applies brand profiles across multiple documents without authorization, affecting organizational branding consistency.

From the tool's definition Tool name 'set_brand' and description 'Update brand identity metadata in the document' indicate modification of existing document data. The word 'Update' is a classic Write operation marker.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set_brand Rate-limited

set_brand 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": {
    "set_brand": {
      "limits": [
        {
          "counter": "set_brand_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 AI-Canvas MCP Server, so you can run agents against it safely.

FAQ

Questions about set_brand

What does the set_brand tool do? +

Update brand identity metadata in the document. It is categorised as a Write tool in the AI-Canvas 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 set_brand? +

Register the AI-Canvas MCP Server MCP server in PolicyLayer and add a rule for set_brand: 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 AI-Canvas MCP Server. Nothing to install.

What risk level is set_brand? +

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

Can I rate-limit set_brand? +

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

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

set_brand is provided by the AI-Canvas MCP Server MCP server (laoluojuhai/ai-canvas). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.