drafts_create · Slack MCP: Risk & Policy

WHAT IT DOES

What drafts_create does on Slack

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

WHY IT NEEDS A POLICY

Why drafts_create needs a policy

Creating drafts is a reversible write operation that modifies state (adds new draft objects) without deleting or overwriting existing data. While the description is empty, the tool name and server context make the intent clear. Severity is medium because drafts are typically not immediately visible to others and can be easily deleted, limiting blast radius compared to publishing actual messages.

From the tool's definition Tool name 'drafts_create' indicates creation of draft messages. Server description states it 'Provides LLMs full access to Slack: messages, channels, files, canvases, lists, search, reactions, and more via 220 tools.' The 'create' verb and context of…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

drafts_create Rate-limited

drafts_create 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": {
    "drafts_create": {
      "limits": [
        {
          "counter": "drafts_create_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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

FAQ

Questions about drafts_create

What does the drafts_create tool do? +

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

How do I enforce a policy on drafts_create? +

Register the Slack MCP server in PolicyLayer and add a rule for drafts_create: 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 Slack. Nothing to install.

What risk level is drafts_create? +

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

Can I rate-limit drafts_create? +

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

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

drafts_create is provided by the Slack MCP server (karbassi/slack-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.