add_ticket_tags · Zendesk MCP: Risk & Policy

WHAT IT DOES

What add_ticket_tags does on Zendesk

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

WHY IT NEEDS A POLICY

Why add_ticket_tags needs a policy

This tool modifies ticket metadata (tags) in a reversible manner by appending new tags to existing ones. It does not delete data, execute code, move money, or trigger external operations—it simply updates ticket attributes. This makes it a Write operation.

From the tool's definition Tool description states it "Add tags to a ticket" and "Appends to current tags", which is a modification operation. No data deletion or financial impact occurs.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_ticket_tags Rate-limited

add_ticket_tags 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_ticket_tags": {
      "limits": [
        {
          "counter": "add_ticket_tags_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 Zendesk, so you can run agents against it safely.

FAQ

Questions about add_ticket_tags

What does the add_ticket_tags tool do? +

Add tags to a ticket without removing existing ones. Appends to current tags. It is categorised as a Write tool in the Zendesk 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_ticket_tags? +

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

What risk level is add_ticket_tags? +

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

Can I rate-limit add_ticket_tags? +

Yes. Add a rate_limit block to the add_ticket_tags 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_ticket_tags completely? +

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

add_ticket_tags is provided by the Zendesk MCP server (kalchevs/zendesk-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.