drafts_update · Slack MCP: Risk & Policy

WHAT IT DOES

What drafts_update does on Slack

AI agents use drafts_update 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_update needs a policy

The tool name 'drafts_update' clearly performs a Write operation—updating existing draft objects in Slack. This is reversible (drafts can be re-edited or deleted separately) and modifies data without destruction.

From the tool's definition Tool name 'drafts_update' indicates modification of draft content. The description is empty, limiting direct evidence, but 'update' is a classic Write operation keyword.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

drafts_update Rate-limited

drafts_update 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_update": {
      "limits": [
        {
          "counter": "drafts_update_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 Slack, so you can run agents against it safely.

FAQ

Questions about drafts_update

What does the drafts_update tool do? +

drafts_update. 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_update? +

Register the Slack MCP server in PolicyLayer and add a rule for drafts_update: 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_update? +

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

Can I rate-limit drafts_update? +

Yes. Add a rate_limit block to the drafts_update 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_update completely? +

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

drafts_update 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.