MCP Server
Moltline Humanizer
com.moltlinestudio/humanizer
What this MCP does
Analyzes writing for AI-generated style indicators, fingerprints writing voices, and supports humanization and rewrite verification.
Capabilities
Tools
5
tools
ai_tell_scan
Ai Tell Scan
Scan a draft for the measurable tells of AI-generated prose. FREE.
Flags stock phrases (with exact quotes), structural reflexes, uniform
sentence rhythm, em-dash overuse, and hedging boilerplate — every flag
cites the actual text. Typical input {"text": "<draft>"} returns
{"reads_human_score": 0-100, "metrics": {"burstiness": ...,
"avg_sentence_len": ..., ...}, "evidence": [{"type": "stock_phrase",
"quote": "..."}], "note": "..."}.
Use for a first read on whether a draft carries machine-writing signals.
Reports measurable patterns, not a verdict on who wrote the text, and must
not be used to accuse a person of anything. Not for rhythm detail
(burstiness_report) or for a rewrite brief (humanize_plan). Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "empty text"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.
Read only
Idempotent
Input schema
{'type': 'object', 'required': ['text'], 'properties': {'text': {'type': 'string', 'description': 'The draft to scan — at least one full sentence of plain text.'}}, 'additionalProperties': False}
Output schema
{'type': 'object', 'additionalProperties': True}
burstiness_report
Burstiness Report
Map a draft's sentence rhythm and find where it goes flat. FREE.
Reports per-sentence lengths, the burstiness coefficient, and runs of
similar-length sentences. Typical input {"text": "<draft>"} returns
{"sentence_lengths": [12, 14, 13, 5, 28], "burstiness": 0.52,
"flat_runs": [{"sentences": "1-3", "lengths": [12, 14, 13]}],
"tip": "..."}.
Use when prose reads flat and sentence-length pattern is the suspect. Not
for a full inventory of tells (ai_tell_scan). Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "need 3+ sentences"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.
Read only
Idempotent
Input schema
{'type': 'object', 'required': ['text'], 'properties': {'text': {'type': 'string', 'description': 'The draft to analyze; needs at least 3 sentences.'}}, 'additionalProperties': False}
Output schema
{'type': 'object', 'additionalProperties': True}
humanize_plan
Humanize Plan
Produce a precise rewrite brief that de-AIs a draft, with numeric targets. PREMIUM (license).
Lists every flagged tell with its fix and sentence-rhythm surgery
targets; when a voice_fingerprint result is supplied, adds numeric
targets to hit that person's voice. Apply the brief with your agent,
then confirm with verify_rewrite. Typical input {"text": "<draft>",
"fingerprint": <voice_fingerprint result>} returns {"current_score":
0-100, "edit_list": ["..."], "numeric_targets": {...}, "process": ...,
"integrity_note": ...}.
Use after a scan has identified what to fix; returns a brief, not
rewritten prose. Not for checking whether a rewrite worked
(verify_rewrite). Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"}. Every call is read-only and idempotent, so after correcting the input it is always safe to retry.
Read only
Idempotent
Input schema
{'type': 'object', 'required': ['text'], 'properties': {'text': {'type': 'string', 'description': 'The AI draft to plan a rewrite for.'}, 'fingerprint': {'type': 'object', 'default': None, 'description': 'Optional voice profile object exactly as returned by\nvoice_fingerprint; omit for a style-only pass.', 'additionalProperties': True}}, 'additionalProperties': False}
Output schema
{'type': 'object', 'additionalProperties': True}
verify_rewrite
Verify Rewrite
Verify a rewrite actually improved: score delta, meaning check, voice distance. PREMIUM (license).
Compares reads-human score before/after, a meaning-preservation proxy,
and (with a fingerprint) numeric distance to the target voice. Typical
input {"original": "<draft>", "rewrite": "<edited draft>"} returns
{"score_before": N, "score_after": N, "score_delta": N,
"content_word_retention_pct": N, "remaining_tells": [...],
"verdict": "Improved — ship it" | "Marginal — ..."}.
Use only when both the before and the after text are available. Not for
scoring a single draft (ai_tell_scan). Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "both texts must be non-empty"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.
Read only
Idempotent
Input schema
{'type': 'object', 'required': ['original', 'rewrite'], 'properties': {'rewrite': {'type': 'string', 'description': 'The same content after the humanize_plan edits.'}, 'original': {'type': 'string', 'description': 'The draft before editing.'}, 'fingerprint': {'type': 'object', 'default': None, 'description': 'Optional voice profile object exactly as returned by\nvoice_fingerprint, to measure distance to the target voice.', 'additionalProperties': True}}, 'additionalProperties': False}
Output schema
{'type': 'object', 'additionalProperties': True}
voice_fingerprint
Voice Fingerprint
Build a measurable voice profile from samples of a person's real writing. FREE.
Feed it 2+ samples (emails, posts, essays — 150+ words total) and use
the result with humanize_plan / verify_rewrite. Typical input
{"samples": ["<email text>", "<blog post>"]} returns {"label":
"my-voice", "target_metrics": {"avg_sentence_len": ..., "burstiness":
..., ...}, "favorite_words": [...], "signature_habits": ["..."],
"words_analyzed": N}.
Use on samples the person actually wrote, to build a target profile. Not
for scoring an unknown draft (ai_tell_scan) and not on text the person did
not write. Errors: on invalid, missing, or malformed input this tool never raises a protocol error — it returns {"error": "<what is wrong and how to fix it>"} (for example {"error": "need 150+ words of real writing across the samples"}). Every call is read-only and idempotent, so after correcting the input it is always safe to retry.
Read only
Idempotent
Input schema
{'type': 'object', 'required': ['samples'], 'properties': {'label': {'type': 'string', 'default': 'my-voice', 'description': 'Optional name for this voice profile. Default "my-voice".'}, 'samples': {'type': 'array', 'items': {'type': 'string'}, 'description': 'List of real writing samples by the same person; 150+\nwords combined across all samples.'}}, 'additionalProperties': False}
Output schema
{'type': 'object', 'additionalProperties': True}
History
Recent tool changes
Added
verify_rewrite
Sept. 17, 2026, 12:36 p.m.
Added
humanize_plan
Sept. 17, 2026, 12:36 p.m.
Added
burstiness_report
Sept. 17, 2026, 12:36 p.m.
Added
voice_fingerprint
Sept. 17, 2026, 12:36 p.m.
Added
ai_tell_scan
Sept. 17, 2026, 12:36 p.m.
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