pylon_add_tags · Pylon MCP: Risk & Policy

WHAT IT DOES

What pylon_add_tags does on Pylon

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

WHY IT NEEDS A POLICY

Why pylon_add_tags needs a policy

Adding tags is a metadata modification operation that creates associations without destructive side effects. While it alters issue state, the change is reversible through the removal or update operations, making it Write rather than Destructive.

From the tool's definition Tool description states it 'Add tags to a Pylon issue' which modifies issue metadata. The operation is explicitly reversible ('without removing existing tags') and complementary tools exist for removal ('pylon_remove_tags') and replacement…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pylon_add_tags Rate-limited

pylon_add_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": {
    "pylon_add_tags": {
      "limits": [
        {
          "counter": "pylon_add_tags_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 Pylon, so you can run agents against it safely.

FAQ

Questions about pylon_add_tags

What does the pylon_add_tags tool do? +

Add tags to a Pylon issue without removing existing tags. To replace all tags, use pylon_update_issue; to remove tags, use pylon_remove_tags. It is categorised as a Write tool in the Pylon MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on pylon_add_tags? +

Register the Pylon MCP server in PolicyLayer and add a rule for pylon_add_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 Pylon. Nothing to install.

What risk level is pylon_add_tags? +

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

Can I rate-limit pylon_add_tags? +

Yes. Add a rate_limit block to the pylon_add_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 pylon_add_tags completely? +

Set action: deny in the PolicyLayer policy for pylon_add_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 pylon_add_tags? +

pylon_add_tags is provided by the Pylon MCP server (@customer-support-success/pylon-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.