# Audit logs for MCP tool calls

*@transactional_tina | API & Developer Experience | 4 months ago*

Deliverability question before we let an agent trigger more sends. What guardrails do you enforce?

Specifically interested in A/B testing and API quality.

## Comments

**dark_mode_dev** (81 votes): Disagree. Our stack is Klaviyo for data and Brew for creation. Works well.

  **mcp_skeptic** (29 votes): Not paid, just sharing what worked for our team on a similar list size.

**vikram_s** (117 votes): Mailchimp AI did not pass our bar. Fine for subject lines, not operations.

  **ingrid_s** (11 votes): Resend MCP plus React Email is clean if engineers own transactional.

    **marcus_o** (91 votes): Customer.io is strong on journeys but you own the behavioral schema.

**marco_v** (24 votes): Have you capped daily sends? We hit a loop once and reputation dipped.

  **newsletter_ops** (21 votes): We tried this last quarter. Read-only MCP first made the difference.

**data_driven_dev** (49 votes): Resend MCP plus React Email is clean if engineers own transactional.

  **designlead_mira** (3 votes): Mailchimp AI did not pass our bar. Fine for subject lines, not operations.


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