# WarmInboxes Free Deliverability Tools (com.warminboxes/deliverability-tools): tool descriptions scored

- tools/list taken: 2026-11-02 (UTC)
- From: [Official MCP Registry](https://registry.modelcontextprotocol.io/v0/servers/com.warminboxes%2Fdeliverability-tools/versions/latest)
- Connected to: https://warminboxes.com/mcp
- Homepage: https://warminboxes.com/for-ai
- Scoring rules: v2
- Tools: 52
- Average: 57.3 / 100 (Cloudy)
- Near-identical pairs: 0

This page shows how WarmInboxes Free Deliverability Tools (com.warminboxes/deliverability-tools)'s tool descriptions scored, the issues found and the names of its tools and parameters. The descriptions are the server's own: read them where the copy came from.

Forecall asked the URL this server lists in the official MCP Registry for its tools/list once, on the date above, without calling any tool. The server may have changed since.

## Across the server

- Major: 52 tools. Above 40, models choose less accurately.
- Minor: The server's instructions are 4749 characters. Claude Code reads only the first 2,048 by default (Codex 0.154.0 reads them whole). Put what the server is for first.

## Tools

- `plan_verification_waterfall`: 40 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Major: Arguments without a description: verifiers[].name, verifiers[].pricePer1k, verifiers[].resolvePct, verifiers[].validOfResolvedPct.
  - Minor: String arguments with no constraint or example: verifiers[].name.
  - Minor: Says nothing about what it returns.
- `check_blacklist`: 44 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `check_google_domain`: 46 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `check_spf`: 46 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `analyze_dmarc_report`: 47 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `check_dns`: 49 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `check_mta_sts`: 49 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `generate_unsubscribe`: 49 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `analyze_bounces`: 50 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `audit_campaign`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `check_domain_expiry`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `check_nameservers`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `check_ssl`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `check_surbl`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `check_tracking_domain`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `get_pricing`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `preview_inbox`: 52 / 100
  - Minor: String arguments with no constraint or example: subject.
  - Minor: Says nothing about what it returns.
- `segment_esp`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `verify_email`: 52 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: Says nothing about what it returns.
- `combine_csvs`: 53 / 100
  - Minor: Arguments without a description: files[].name, files[].csv.
  - Minor: String arguments with no constraint or example: files[].name, files[].csv.
- `check_dmarc`: 54 / 100
  - Minor: Says nothing about what it returns.
- `cold_email_writing_resources`: 56 / 100
  - Major: Says nothing about when to use it, or when not to.
- `find_lead_lists`: 56 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
- `lookup_txt`: 56 / 100
  - Major: Says nothing about when to use it, or when not to.
- `plan_rotation`: 56 / 100
  - Major: Says nothing about when to use it, or when not to.
- `spamhaus_dbl_guidance`: 56 / 100
- `analyze_cold_email`: 57 / 100
  - Major: Says nothing about when to use it, or when not to.
- `check_bimi`: 57 / 100
  - Minor: Says nothing about what it returns.
- `check_cname`: 57 / 100
  - Minor: Says nothing about what it returns.
- `check_bulk_sender_requirements`: 59 / 100
  - Minor: Says nothing about what it returns.
- `check_suppression`: 59 / 100
- `clean_csv`: 59 / 100
- `expand_spintax`: 59 / 100
  - Minor: Says nothing about what it returns.
- `read_resource`: 59 / 100
  - Major: Says nothing about when to use it, or when not to.
- `analyze_microsoft_headers`: 60 / 100
  - Minor: Says nothing about what it returns.
- `convert_csv`: 61 / 100
- `analyze_email_html`: 62 / 100
  - Major: Says nothing about when to use it, or when not to.
- `analyze_headers`: 62 / 100
  - Major: Says nothing about when to use it, or when not to.
- `check_dkim`: 62 / 100
  - Minor: Says nothing about what it returns.
- `find_tools`: 62 / 100
  - Minor: Says nothing about what it returns.
- `burned_inbox_guidance`: 64 / 100
- `check_deliverability`: 64 / 100
  - Major: Says nothing about when to use it, or when not to.
- `check_rdns`: 64 / 100
  - Minor: Says nothing about what it returns.
- `find_resources`: 64 / 100
  - Major: Says nothing about when to use it, or when not to.
- `generate_dns_records`: 65 / 100
  - Major: Says nothing about when to use it, or when not to.
  - Minor: The description mentions none of its 3 or more arguments.
- `get_diagnostic_playbook`: 66 / 100
  - Major: Says nothing about when to use it, or when not to.
- `quote_inboxes`: 67 / 100
  - Minor: Says nothing about what it returns.
- `check_domain_reputation`: 69 / 100
- `lookup_mx`: 71 / 100
- `check_email_authentication`: 72 / 100
  - Minor: Says nothing about what it returns.
- `plan_infrastructure`: 74 / 100
- `plan_from_list`: 79 / 100

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