ops_access_policy_set · Slack Max API MCP: Risk & Policy

WHAT IT DOES

What ops_access_policy_set does on Slack Max API MCP

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

WHY IT NEEDS A POLICY

Why ops_access_policy_set needs a policy

This tool modifies security-relevant state (access-control profile) rather than deleting it, making it Write rather than Destructive. However, the modification of access control policies has high severity because incorrect profile switching could grant/revoke permissions broadly across the MCP runtime, affecting which operations subsequent tools can perform.

From the tool's definition Tool name 'ops_access_policy_set' and description 'Switch the active Slack access-control profile for this MCP runtime state' indicates modification of access control configuration.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

ops_access_policy_set Rate-limited

ops_access_policy_set 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": {
    "ops_access_policy_set": {
      "limits": [
        {
          "counter": "ops_access_policy_set_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 Max API MCP, so you can run agents against it safely.

FAQ

Questions about ops_access_policy_set

What does the ops_access_policy_set tool do? +

Switch the active Slack access-control profile for this MCP runtime state. It is categorised as a Write tool in the Slack Max API MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on ops_access_policy_set? +

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

What risk level is ops_access_policy_set? +

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

Can I rate-limit ops_access_policy_set? +

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

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

ops_access_policy_set is provided by the Slack Max API MCP server (jeongwoobin335/slack-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.