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dead-letter

dead-letter

PyPI package Python versions License: PolyForm Noncommercial

Your .eml files deserve a second life.

dead-letter converts email exports into clean Markdown with YAML front matter — threads split, signatures stripped, attachments extracted, calendars parsed. One file or ten thousand.

✨ Features

  • Full-fidelity conversion — HTML sanitization, Gmail/Outlook thread segmentation, inline image handling, and calendar event summaries

  • CLI — point it at a file or a directory and go

  • Local web UI — dark command-center interface with drag-and-drop import, watch mode, conversion grade badges, processing history, and per-job diagnostics

  • Inbox/Cabinet workflow — drop .eml files into an Inbox, let dead-letter organize the Markdown bundles into a Cabinet

  • Install validationdead-letter doctor checks your runtime environment

  • Conversion report — opt-in JSON report with per-file diagnostics, including attachment referenced/retained counts for automation and audit

  • MCP server — integrate with Claude Desktop, Claude Code, Codex, and other MCP clients

  • Claude plugin — one-command install in Claude Code or Cowork with four slash commands (/dead-letter:convert, /dead-letter:summarize, /dead-letter:triage, /dead-letter:cabinet)

  • Python APIfrom dead_letter import convert and you're off

Related MCP server: DingusMail

🧠 Built for LLM Pipelines

Raw .eml files are noisy input for downstream LLM and retrieval pipelines — MIME headers, multipart boundaries, duplicated HTML/plain bodies, and encoded attachments all get mixed into the text path.

dead-letter normalizes that into Markdown with YAML front matter, so message text and metadata are ready for chunking or indexing without MIME parsing or base64 cleanup. Default convert() and convert_dir() runs write a single .md per message and keep attachment names in front matter.

If you want the filesystem artifacts separated too, bundle and Cabinet workflows write message.md plus retained decoded files under attachments/. The Markdown is ready for text ingestion, while PDFs, spreadsheets, calendar files, and other retained binary attachments stay cleanly split out for whatever downstream parser you already use.

For direct LLM integration, the MCP server lets Claude Desktop, Claude Code, Codex, and other MCP clients call dead-letter's conversion tools without shelling out.

📊 Token-cost benchmarks

dead-letter's value isn't fewer tokens than every alternative — it's fidelity per token: the cheapest representation that keeps the email intact. Measured across a synthetic corpus of HTML threads, attachments, and newsletters (tokenizer o200k_base, medians):

  • ~88% fewer tokens than the raw .eml — a single email with a PDF attachment is ~126k tokens raw vs ~180 converted.

  • The only representation that keeps the email whole — thread structure, per-message sender attribution, links, and attachment metadata all survive. Naive text extraction is cheaper precisely because it drops them (0/2 attachments retained vs dead-letter's 2/2).

The benchmark is honest about where it loses: naive extraction is fewer tokens when you don't mind throwing away attachments, links, and thread structure. Full method, the complete table (including those rows), tokenizer disclosure, and a one-command reproduce are in benchmarks/.

📦 Install

With Homebrew on Apple silicon macOS:

brew tap BigCactusLabs/tap
brew install dead-letter

The Homebrew formula installs the core CLI only: dead-letter convert and dead-letter doctor. It intentionally does not bundle the optional web UI or MCP server dependency stacks.

With pip:

pip install dead-letter            # core + CLI
pip install dead-letter[cli]       # + watchfiles (used by backend/UI watch mode)
pip install dead-letter[ui]        # + web UI, API server, and watch mode
pip install dead-letter[mcp]       # + MCP server

Use pipx for isolated UI or MCP installs:

pipx install 'dead-letter[ui]'    # installs dead-letter and dead-letter-ui
pipx install 'dead-letter[mcp]'   # installs dead-letter and dead-letter-mcp

From source:

git clone https://github.com/BigCactusLabs/dead-letter.git
cd dead-letter
uv sync --extra dev     # all extras
uv sync --extra ui      # UI only
uv sync --extra mcp     # MCP only

🚀 Quick Start

CLI — convert a single file:

dead-letter convert message.eml

Convert a whole directory:

dead-letter convert inbox/ --output out/

Generate a JSON conversion report alongside the output:

dead-letter convert inbox/ --output out/ --report

With --output, the report is written to that output directory as .dead-letter-report.json. Without --output, file conversions write the report next to the source message and directory conversions write it to the input directory root.

Check your runtime environment:

dead-letter doctor

Directory conversion scans recursively for .eml files, matches the suffix case-insensitively, skips symlinked files whose resolved targets escape the requested input tree, and deduplicates in-tree symlink aliases that resolve to the same message file.

Web UI — start the local server:

dead-letter-ui --host 127.0.0.1 --port 8765

Open http://127.0.0.1:8765 — on first launch, a setup prompt suggests default Inbox and Cabinet folders. Configure or skip to start converting. Import .eml files with drag and drop or the file picker. Single-file imports use file mode, while multi-file drops create one directory-mode batch job. Mixed drops ask for confirmation before skipping non-.eml files. The backend enforces a 100 MB per-file import limit for both single and batch uploads.

From a source checkout, prefix with uv run:

uv run dead-letter convert message.eml
uv run --extra ui dead-letter-ui --host 127.0.0.1 --port 8765

🐍 Python API

from dead_letter import convert

result = convert("message.eml")
print(result.subject, result.sender)
print(result.output)  # path to the generated .md

With options:

from dead_letter import convert, ConvertOptions

result = convert("message.eml", options=ConvertOptions(
    strip_signatures=True,
    strip_quoted_headers=True,
))

Strip signature images (logos, social icons) and tracking pixels:

result = convert("message.eml", options=ConvertOptions(
    strip_signature_images=True,
    strip_tracking_pixels=True,
))

When enabled, these filters remove matched images from rendered Markdown and omit stripped inline signature/tracking assets from bundle attachment output.

Bundle conversion (Markdown + attachments + source in one directory):

from dead_letter import convert_to_bundle

bundle = convert_to_bundle("message.eml", bundle_root="cabinet/", source_handling="copy")
print(bundle.markdown)     # cabinet/message/message.md
print(bundle.attachments)  # retained extracted files under cabinet/message/attachments/

source_handling="copy" preserves the original .eml in place. If omitted, convert_to_bundle() defaults to source_handling="move" and moves the source message into the bundle.

Retained extracted attachment filenames are normalized to safe basenames before they are written under attachments/.

Quality diagnostics include referenced/retained attachment counts when a message has attachments eligible for retention, so dropped artifacts are machine-detectable. See Quality Diagnostics.

Batch:

from dead_letter import convert_dir

for r in convert_dir("inbox/", output="out/"):
    print(f"{'✓' if r.success else '✗'} {r.source.name}")

🔌 MCP Server

dead-letter ships an MCP server so LLM clients can convert .eml files directly without shelling out.

Install and launch:

pip install dead-letter[mcp]
dead-letter-mcp

From a source checkout:

uv run --extra mcp dead-letter-mcp

Claude Desktop — add to claude_desktop_config.json:

{
  "mcpServers": {
    "dead-letter": {
      "command": "uv",
      "args": ["--directory", "/path/to/dead-letter", "run", "--extra", "mcp", "dead-letter-mcp"]
    }
  }
}

Claude Code or Cowork (recommended — Claude plugin):

/plugin marketplace add BigCactusLabs/bigcactuslabs-plugins
/plugin install dead-letter

The plugin bundles the MCP server (via uvx, no pip install needed — just uv on PATH) and adds four slash commands: /dead-letter:convert, /dead-letter:summarize, /dead-letter:triage, /dead-letter:cabinet. Email content handled through the plugin is treated as untrusted data, not instructions, so tool-use, credential, and exfiltration requests embedded in messages are not followed. Source under plugin/.

The marketplace pins each published plugin tag and commit. Release automation updates that pointer only after the bundled MCP server's exact PyPI version is live, so Claude Code and Cowork resolve the same reproducible release.

Claude Code (manual MCP add — alternative):

claude mcp add dead-letter -- uv run --extra mcp dead-letter-mcp

Codex:

codex mcp add dead-letter -- uv run --extra mcp dead-letter-mcp
codex mcp list

The codex mcp add command registers the local dead-letter MCP server, and codex mcp list verifies that it's available.

Tools

Tool

Required arguments

Returns

convert_eml

eml_path

Markdown text. Also writes a file when output_path is given.

convert_eml_to_bundle

eml_path, bundle_root

JSON with bundle_path, markdown_path, attachment_paths. Copy-only: the original .eml is never moved or deleted.

convert_directory

directory, output_directory

JSON summary. Capped at 50 .eml files per call.

get_diagnostics

eml_path

Quality and structure JSON. Writes nothing permanent.

All four take a preset (default, clean, verbose, raw) and per-flag overrides. Full contract, including the MCP-only constraints and the error-text table: docs/reference/v4-runtime-contracts.md.

🗂 Project Structure

src/dead_letter/
├── core/           # conversion pipeline (MIME, HTML, threads, rendering)
├── backend/        # CLI, API server, job runner, watch mode, MCP server
└── frontend/       # static web UI (Alpine.js ES modules + vanilla fetch)
tests/
├── core/           # conversion pipeline tests with .eml fixtures
├── backend/        # API, job, and watch tests
├── plugin/         # Claude plugin manifest, skill, and command tests
└── frontend/       # JS unit tests

🧪 Testing

uv run pytest -q tests/core        # conversion pipeline
uv run pytest -q tests/backend     # API and job runner
uv run pytest -q tests/plugin      # Claude plugin manifest, skill, and command surfaces
node --test tests/frontend/*.test.js     # frontend

CI runs all four on PRs and on pushes to main or feat/** branches with the same commands, plus npx --yes @anthropic-ai/claude-code@2.1.145 plugin validate plugin/ and node --check src/dead_letter/frontend/static/app.js.

📚 Docs

🔧 Tools We Love

  • MarkEdit — TextEdit for Markdown, native macOS, ~4 MB. Opens dead-letter output like it was always meant to live there.

  • mo — local Markdown viewer that renders files in the browser with live reload. Point it at your Cabinet and read converted mail like a feed.

⚠️ Known Limitations

  • Local-only — no remote server, no auth

  • In-memory job registry (state resets on restart)

  • Single-user, single-machine

License

PolyForm Noncommercial 1.0.0 — free for personal, educational, and nonprofit use. Commercial use requires a separate license from Big Cactus Labs.

Available Tools

4 tools
convert_directoryA

Batch convert all .eml files in a directory to Markdown.

Recursively finds all .eml files and converts them. Returns a JSON summary with total, successes, failures, output_paths, and errors.

Use convert_eml to retrieve individual converted file content.

ParametersJSON Schema
NameRequiredDescriptionDefault
presetNodefault
dry_runNo
directoryYes
thread_modeNolatest
thread_orderNooldest-first
include_raw_htmlNo
output_directoryNo
strip_signaturesNo
strip_disclaimersNo
embed_inline_imagesNo
include_all_headersNo
no_calendar_summaryNo
strip_quoted_headersNo
strip_tracking_pixelsNo
strip_signature_imagesNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A3.5/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Without annotations, the description adds value by stating batch conversion, recursion, and JSON summary structure, but lacks info on side effects, permissions, or limitations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three concise sentences, front-loaded with purpose, no fluff, and ends with a helpful alternative reference.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (15 parameters), the description covers only basic behavior and output, leaving the agent without insight into key configuration options.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With 0% schema description coverage and 15 parameters, the description provides no explanation for any parameter beyond the directory. Agent has no guidance on presets, dry_run, etc.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool batch converts .eml files in a directory to Markdown, with recursive behavior, and distinguishes itself from sibling convert_eml by mentioning individual file retrieval.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides a clear alternative: use convert_eml for individual file content. However, it does not explicitly state when not to use this tool or mention the sibling convert_eml_to_bundle.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

convert_emlA

Convert a .eml email file to Markdown with YAML front matter.

Returns the full Markdown content (front matter + body). When output_path is provided, also writes the file to disk.

Presets bundle common flag combinations:

  • default: strips signatures, tracking pixels, signature images

  • clean: default + strips disclaimers and quoted headers

  • verbose: includes all headers and raw HTML

  • raw: no stripping, preserves everything

Individual flags override the preset when provided.

ParametersJSON Schema
NameRequiredDescriptionDefault
presetNodefault
eml_pathYes
output_pathNo
thread_modeNolatest
thread_orderNooldest-first
include_raw_htmlNo
strip_signaturesNo
strip_disclaimersNo
embed_inline_imagesNo
include_all_headersNo
no_calendar_summaryNo
strip_quoted_headersNo
strip_tracking_pixelsNo
strip_signature_imagesNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.2/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries full burden. It discloses the return value (Markdown with front matter), the optional disk write, and the behavior of presets and flag overrides. However, it does not explain the thread_mode and thread_order parameters, leaving some behavioral aspects unexplained.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is concise with six sentences, front-loaded with the core action, and uses a clear bullet-like list for presets. Every sentence adds value without repetition or fluff.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's complexity (14 parameters, presets, output schema), the description covers the main purpose, return value, presets, and override logic. It lacks explanation for thread_mode and thread_order, but overall provides sufficient context for most use cases.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must add meaning. It explains presets and mentions several flags (signatures, tracking pixels, etc.), and notes that individual flags override presets. However, it omits details for thread_mode, thread_order, and some boolean flags. The presets bundling compensates partially.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool converts .eml to Markdown with YAML front matter, specifying the output format and the optional file write. It implicitly distinguishes from siblings like convert_directory and convert_eml_to_bundle by focusing on a single file conversion.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides clear guidance on preset usage and flag overrides, but it does not explicitly state when to use this tool versus sibling tools like convert_directory or convert_eml_to_bundle, which would help an agent choose correctly.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

convert_eml_to_bundleB

Convert a .eml file to a self-contained bundle with markdown and attachments.

Creates a directory containing the converted markdown, extracted attachments, and optionally the original .eml source.

source_handling only accepts 'copy' over MCP: the original .eml is copied into the bundle and left untouched. The 'move' and 'delete' modes are rejected here — use the CLI or the Python API for those.

Returns JSON with bundle_path, markdown_path, attachment_paths, and optional diagnostics.

ParametersJSON Schema
NameRequiredDescriptionDefault
presetNodefault
eml_pathYes
bundle_rootYes
thread_modeNolatest
thread_orderNooldest-first
source_handlingNocopy
include_raw_htmlNo
strip_signaturesNo
strip_disclaimersNo
embed_inline_imagesNo
include_all_headersNo
no_calendar_summaryNo
strip_quoted_headersNo
strip_tracking_pixelsNo
strip_signature_imagesNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

B3.1/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of behavioral disclosure. It states that the tool creates a directory, copies the .eml, leaves the source untouched, and returns a JSON structure with specific fields. It also discloses that move/delete modes are rejected. However, it does not mention potential side effects like overwriting existing directories, error handling, or permissions. Still, the core mutation and side-effect profile is clear, warranting a 4.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is about 120 words, organized into a brief purpose statement, a note on source_handling, and a return-value summary. It is not excessively verbose and front-loads the core action. Some redundancy exists (e.g., stating the return format), but it remains appropriately sized for the complexity.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Despite an output schema (which the description partially covers by naming returned fields), the tool has 15 parameters and 0% schema description coverage. The description only addresses source_handling, leaving the meaning of presets, thread modes, and all boolean flags unexplained. This is a significant gap for an agent to invoke the tool correctly with the full range of options.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters2/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0%, so the description must compensate. It only explains source_handling, noting the 'copy' limitation. The other 14 parameters (preset, thread_mode, thread_order, boolean flags) are left undefined. The description adds value for one parameter but fails to clarify the vast majority, leaving agents without essential meaning for the options they may set.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose: converting an .eml file into a self-contained bundle with markdown and attachments. It uses a specific verb and resource, but does not differentiate from sibling tools like convert_eml or convert_directory. The purpose is unambiguous, earning a 4 rather than a 5 because it lacks explicit sibling differentiation.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides a constraint on source_handling (only 'copy' is accepted over MCP, with guidance to use CLI/API for other modes) but does not explain when to choose this tool over its siblings. There is no mention of convert_eml, convert_directory, or get_diagnostics as alternatives for different scenarios. The guidance is parameter-specific rather than tool-selection-focused.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

get_diagnosticsA

Inspect email quality and structure without writing permanent files.

Use this to assess conversion quality before committing, or to troubleshoot problematic .eml files.

Always returns JSON with: state (normal/degraded/review_recommended), selected_body, segmentation_path, client_hint, confidence, fallback_used, and warnings. Two keys are conditional: stripped_images appears only when images were removed, and attachments only when the message had attachments eligible for retention.

ParametersJSON Schema
NameRequiredDescriptionDefault
presetNodefault
eml_pathYes
thread_modeNolatest
thread_orderNooldest-first
include_raw_htmlNo
strip_signaturesNo
strip_disclaimersNo
embed_inline_imagesNo
include_all_headersNo
no_calendar_summaryNo
strip_quoted_headersNo
strip_tracking_pixelsNo
strip_signature_imagesNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A3.9/5.0
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of disclosing behavior. It explicitly states the operation is non-destructive ('without writing permanent files'), and thoroughly describes the return structure: 'Always returns JSON with: state (normal/degraded/review_recommended), selected_body, segmentation_path, client_hint, confidence, fallback_used, and warnings.' It also details conditional keys (stripped_images only when images removed, attachments only when eligible), providing comprehensive insight into output behavior without relying on annotations.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is well-structured and concise: it opens with the core purpose, then provides usage guidance, and ends with a precise list of return keys and conditional behaviors. Each sentence adds value, there is no fluff, and the most critical information (non-destructive, purpose, use cases) is front-loaded.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

While the description thoroughly explains the return format and gives usage context, it leaves the 13 parameters completely undocumented. Given the tool's complexity (multiple enums, boolean toggles) and the lack of schema descriptions, an agent would not be able to correctly configure parameters without external knowledge. The output schema exists (per context signals) and the description explains return values, but the absence of parameter semantics makes the definition incomplete for correct invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters1/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema has 0% description coverage, and the description provides no explanation of any of the 13 parameters. While the description mentions some related behaviors (e.g., conditional keys for stripped images and attachments), it does not explain what parameters like 'preset', 'thread_mode', 'strip_signatures', or 'include_raw_html' actually control. The agent is left to infer from parameter names alone, which is insufficient for a tool with this many options. The description fails to compensate for the schema's lack of parameter descriptions.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose: 'Inspect email quality and structure without writing permanent files.' It specifies the verb ('inspect'), the resource ('email quality and structure'), and the non-destructive nature. It also names use cases ('assess conversion quality before committing, or to troubleshoot problematic .eml files'), which effectively distinguishes it from the sibling conversion tools (convert_eml, convert_eml_to_bundle, convert_directory) that perform transformations rather than inspection.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides explicit usage scenarios: 'Use this to assess conversion quality before committing, or to troubleshoot problematic .eml files.' This gives clear context for when to use the tool. However, it does not explicitly state when not to use it or mention the sibling conversion tools as alternatives, relying on the implicit inference that conversion tools are for transforming files while this inspects them. A slight improvement would be naming the alternatives directly, so 4.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections. Dates show when Glama detected each change.

  1. 4 tool updatesv0.2.4
    • First observedconvert_directory
    • First observedconvert_eml
    • First observedconvert_eml_to_bundle
    • First observedget_diagnostics

TDQS

A3.7/5.0
Disambiguation4/5

The tools have distinct purposes: batch conversion, single conversion, bundle conversion, and diagnostics. However, convert_eml and convert_eml_to_both overlap as single-file converters, though descriptions clarify the difference in output. No tools are truly ambiguous.

Naming Consistency4/5

All conversion tools follow a consistent 'convert_' prefix, while get_diagnostics uses 'get_'. The pattern is clear and logical for each tool's function, with only one deviation that is still fitting.

Tool Count5/5

With 4 tools, the server is well-scoped for an email conversion utility. Each tool serves a distinct and necessary function without redundancy or bloat.

Completeness4/5

The set covers batch conversion, single conversion, bundle creation, and diagnostics. A possible gap is the lack of a tool to manage or list existing bundles, but the core conversion workflow is complete.

Maintenance

ActivityMaintained
ResponsivenessResponsive

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