Permanently delete a label. Use this tool with caution as deletion cannot be undone.
AI agents call delete_label to permanently remove resources in Trello — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool permanently and irreversibly removes a label from the Trello system. Once deleted, the label cannot be recovered. While the blast radius is limited to label objects rather than critical data, the permanent and irreversible nature of deletion, combined with the explicit warning about unundo-ability, classifies this as Destructive rather than Write.
From the tool's definition Tool description explicitly states 'Permanently delete a label' and warns that 'deletion cannot be undone.' The verb 'delete' combined with the irreversible nature of the operation clearly indicates destructive intent.
Documented attack patterns abuse exactly the kind of access delete_label gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Trello, and nothing reaches the server without passing your rules. This is the rule we recommend for delete_label:
{
"version": "1",
"default": "deny",
"hide": [
"delete_label"
]
}delete_label disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
Free to start. No card required.
Permanently delete a label. Use this tool with caution as deletion cannot be undone. It is categorised as a Destructive tool in the Trello MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Trello MCP server in PolicyLayer and add a rule for delete_label: 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 Trello. Nothing to install.
delete_label is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the delete_label 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.
Set action: deny in the PolicyLayer policy for delete_label. 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.
delete_label is provided by the Trello MCP server (v4lheru/trello-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Trello, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
76 Trello tools catalogued and risk-classified — across an index of 43,000+ MCP servers.