Delete a custom field value from a card
AI agents call planka_delete_custom_field_value to permanently remove resources in Planka MCP Server for Claude — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
The tool performs an irreversible deletion of data (a custom field value). Once deleted, the value cannot be recovered without a separate restore operation. This meets the Destructive category definition: 'irreversibly deletes or overwrites data, or actions that cannot be undone.' While the scope is limited to a single custom field value on a card (not a card or project-level deletion), the operation is still…
From the tool's definition Tool name includes 'delete' and description states 'Delete a custom field value from a card' — this operation removes data from a card irreversibly.
Attacks that exploit this kind of access
Delete a custom field value from a card. It is categorised as a Destructive tool in the Planka MCP Server for Claude MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Planka MCP Server for Claude MCP server in PolicyLayer and add a rule for planka_delete_custom_field_value: 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 Planka MCP Server for Claude. Nothing to install.
planka_delete_custom_field_value 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 planka_delete_custom_field_value 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 planka_delete_custom_field_value. 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.
planka_delete_custom_field_value is provided by the Planka MCP Server for Claude MCP server (nextheberg/planka-mcp-server-for-claude). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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