Update a base custom field group
AI agents use planka_update_base_custom_field_group to create or update resources in Planka MCP Server for Claude — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Planka MCP Server for Claude environment.
The 'update' operation modifies existing data (a custom field group configuration) reversibly. This is a Write-category action. Severity is medium because misconfiguration of custom fields could disrupt project management workflows or expose unintended metadata, but the change is reversible and doesn't execute arbitrary code or delete data.
From the tool's definition Tool name 'planka_update_base_custom_field_group' and description 'Update a base custom field group' indicate modification of existing configuration data without deletion.
Attacks that exploit this kind of access
Update a base custom field group. It is categorised as a Write tool in the Planka MCP Server for Claude MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Planka MCP Server for Claude MCP server in PolicyLayer and add a rule for planka_update_base_custom_field_group: 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_update_base_custom_field_group is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the planka_update_base_custom_field_group 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_update_base_custom_field_group. 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_update_base_custom_field_group 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.
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