Voice Agent Linter

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com.modernmustardseed/voice-linterv1.0.0 Domain verified

Lints a phone voice agent prompt and platform config before real callers reach it.

AI & Agents

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https://mcp.modernmustardseed.com/voice-linter

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explain_lint_rule Read-only

Explain one Voice Agent Linter rule by id: why it exists, a bad and a good example, the fix, the platforms it applies to, and its sources with the date each was read. Static reference, no network access.

rule_idstring, required

The rule id, for example no-live-date, vapi-nested-item-enum or no-ai-disclosure.

Tools (3)

explain_lint_rule

read-only

Argument	Type	Description
rule_id*	string	The rule id, for example no-live-date, vapi-nested-item-enum or no-ai-disclosure.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "rule_id"
  ],
  "properties": {
    "rule_id": {
      "enum": [
        "no-live-date",
        "date-without-year",
        "date-param-no-format",
        "phone-as-numerals",
        "email-written-raw",
        "url-written-raw",
        "hyphen-range",
        "long-digit-string",
        "markdown-output",
        "no-spelling-protocol",
        "bare-letter-spelling",
        "english-anchors-multilingual",
        "claims-to-be-human",
        "no-ai-disclosure",
        "no-recording-notice",
        "scripted-tool-start",
        "stall-phrases",
        "silent-opener",
        "long-opener",
        "tool-no-description",
        "tool-param-untyped",
        "tool-param-undescribed",
        "tool-required-missing",
        "tool-result-unstated",
        "vapi-nested-item-enum",
        "vapi-flat-analysis-keys",
        "vapi-analysis-plan-off",
        "vapi-analysis-no-transcript",
        "turbo-tts-stutter",
        "no-human-fallback",
        "no-end-call",
        "vapi-max-duration-default",
        "vapi-free-number-outbound",
        "unfilled-placeholder",
        "secret-in-prompt",
        "prompt-length",
        "contradictory-instructions"
      ],
      "type": "string",
      "description": "The rule id, for example no-live-date, vapi-nested-item-enum or no-ai-disclosure."
    }
  }
}

lint_voice_agent

Check a phone voice agent’s system prompt and, optionally, its config JSON (Vapi assistant, Retell agent or LLM, ElevenLabs agent, or OpenAI Realtime session) against rule-based checks learned on live calls. Finds: no live date and dates without a year; phone numbers, emails, URLs, hyphen ranges and long numbers the voice will misread; no spelling protocol or bare-letter spelling; instructions to pass as human, missing AI disclosure and missing recording notice; scripted tool start lines, stall phrases and silent or long openers; tools with no description, untyped or undescribed parameters, undefined required fields, unformatted date parameters and unstated results; Vapi nested item enums, flat analysisPlan keys, disabled plans and plans without the transcript; ElevenLabs Turbo stutter risk; no transfer or callback path and no end-call; placeholders, secrets, very long prompts and contradictory always and never rules. Each finding has a rule id, severity, the exact line (and JSON path for config), an excerpt, a specific message and the fix; disclosure and recording rules carry their legal citations with the date read. Returns a 0 to 100 score and a verdict. Do not paste credentials: API keys, bearer tokens, passwords and the values of secret-named config fields (apiKey, secret, token, password, credentials, Authorization) are stripped from the input before any check runs and replaced with "[secret removed]", so they are never read, returned, logged or stored; the output says how many were removed. No model reads the input and nothing is stored. Informational, not legal advice.

read-only

Argument	Type	Description
platform	string	Which platform the config is for. "auto" detects it from the JSON.
config_json	string	The agent’s config as a JSON string, exactly as the platform exports it (remove keys first; any left are stripped before checking): a Vapi assistant, a Retell agent and/or LLM (or {"agent": ..., "llm": ...}), an ElevenLabs agent, or an OpenAI Realtime session or session.update event.

list_lint_rules

List every Voice Agent Linter rule with its id, title, default severity, category, what it reads (prompt, config or both) and the platforms it applies to. Filter by platform or category. Static reference, no network access.

read-only

Argument	Type	Description
category	string	Only rules in this category.
platform	string	Only rules that apply to this platform: vapi, retell, elevenlabs or openai_realtime.

Input schema (JSON)

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "category": {
      "enum": [
        "dates",
        "speech",
        "spelling",
        "disclosure",
        "turn_taking",
        "tools",
        "analysis",
        "voice",
        "call_control",
        "hygiene"
      ],
      "type": "string",
      "description": "Only rules in this category."
    },
    "platform": {
      "enum": [
        "vapi",
        "retell",
        "elevenlabs",
        "openai_realtime"
      ],
      "type": "string",
      "description": "Only rules that apply to this platform: vapi, retell, elevenlabs or openai_realtime."
    }
  }
}