{"command":{"effect":"write","timeoutSeconds":30,"inputSchema":{"type":"object","description":"**This endpoint allows you to update a defined Custom Field.**\n\nOnly your Custom fields can be modified; Reserved Fields cannot be updated.","properties":{"path":{"type":"object","properties":{"custom_field_id":{"type":"string"}},"required":["custom_field_id"],"additionalProperties":false},"body":{"type":"object","properties":{"name":{"type":"string","minLength":1,"maxLength":100}},"required":["name"],"examples":[{"name":"new_custom_field_name"}]}},"required":["path"],"additionalProperties":false},"name":"Update Custom Field Definition","id":"sendgrid.mc_custom_fields.updatefielddefinition","example":{"path":{"custom_field_id":"example"}},"maxRequests":1,"summary":false}}