fix(ai) - workflow tool outputs optim + display fix (#21500)

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packages/twenty-server/src/engine/workspace-manager/twenty-standard-application/utils/skill-metadata/create-standard-flat-skill-metadata.util.ts

@@ -74,9 +74,13 @@ Always rely on tool schema definitions:
 - Follow schema definitions exactly for field names, types, and structures
 - Schema includes validation rules and common patterns
 
-## Validation
+## Validation Strategy
 
-The \`create_complete_workflow\` and \`update_workflow_version_step\` tools automatically run validation after their operation and include the results in the response. Review any reported errors and fix them before activating the workflow.
+Build steps fully configured up front so the workflow is correct on the first try. Mutation tools (\`create_complete_workflow\`, \`update_workflow_version_step\`) return a compact validation summary (error codes, messages, suggestions) — fix any reported errors.
+
+Do NOT call \`validate_workflow\` after every change:
+- When making several step edits in a row, pass \`validate: false\` to \`update_workflow_version_step\` to skip per-edit validation.
+- Call \`validate_workflow\` exactly ONCE at the end, before activating. It returns the full report including warnings and available variable paths.
 
 
 ## Approach