unsubscribe · Mcp Espn MCP: Risk & Policy

WHAT IT DOES

What unsubscribe does on Mcp Espn

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

PARAMETERS

Parameter	Type	Required	Description
`id`	string	Yes	Subscription id (uuid) returned by subscribe.

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why unsubscribe needs a policy

The tool modifies a subscription record by deactivating it rather than deleting it, placing it in the Write category. Since historical data is preserved and the action is not truly irreversible, it does not qualify as Destructive. However, misuse could cancel subscriptions unintentionally, giving it medium severity.

From the tool's definition 'Cancel a subscription by id' and 'The row is deactivated (not deleted)' — the action is reversible deactivation, not permanent deletion

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

unsubscribe Rate-limited

unsubscribe 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": {
    "unsubscribe": {
      "limits": [
        {
          "counter": "unsubscribe_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 Mcp Espn, so you can run agents against it safely.

FAQ

Questions about unsubscribe

What does the unsubscribe tool do? +

Cancel a subscription by id. Ownership is enforced — you can only cancel your own subscriptions. The row is deactivated (not deleted) so its historical events stay available via recent_alerts. It is categorised as a Write tool in the Mcp Espn MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does unsubscribe accept? +

unsubscribe accepts 1 parameter: id. Required: id. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on unsubscribe? +

Register the Mcp Espn MCP server in PolicyLayer and add a rule for unsubscribe: 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 Mcp Espn. Nothing to install.

What risk level is unsubscribe? +

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

Can I rate-limit unsubscribe? +

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

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

unsubscribe is provided by the Mcp Espn MCP server (pipeworx-io/mcp-espn). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.