Guide · Agent skill
How to use the Marketing Claims Review agent skill
Updated · written with AI from the project's own documentation and checked against our catalogue data
The marketing-claims-review skill is an agent skill for Claude that reads marketing copy such as landing pages, emails, ads and taglines, pulls out each claim, and labels it. It then checks what proof each claim would need and suggests fixes or softer rewrites for risky lines. This guide explains what the skill does, how to install it, how to trigger it with natural requests, and where its limits are.
Marketing Claims Reviewanthropics/claude-for-legal · Apache-2.0 Download the skill Quick start
- 1Download the skill ZIP. Get the marketing-claims-review ZIP from the product page.
- 2Unzip into your skills folder. Unzip it into ~/.claude/skills/ for personal use, or into a project's .claude/skills/ folder for one project. Alternatively, upload it under Settings → Capabilities → Skills in the Claude apps.
- 3Create the practice-level config. Add a CLAUDE.md at ~/.claude/plugins/config/claude-for-legal/product-legal/ with your marketing claims standards, since the skill reads them from there.
- 4Paste your copy. Give the agent the landing page, email, ad or tagline text, using a natural request or the command form.
- 5Review the claim-by-claim output. Check each label, the substantiation needed and any suggested rewrite.
- 6Send risky items to counsel. Pass any unverified standards or high-risk claims to an attorney for review before the copy ships.
What an agent skill is and what this one does
An agent skill is a folder containing a SKILL.md file that gives an agent extra instructions for a specific task. Once installed, the agent can load these instructions when a request matches the skill's description.
This skill tells the agent to extract every claim in a piece of marketing copy and classify it as puffery, factual, comparative, implied or absolute. For each claim that is not puffery, the agent checks what substantiation would be needed and suggests a fix. Its output is a claim-by-claim review, with a suggested revision where the copy is short enough.
The skill also instructs the agent to look up current advertising standards and to mark anything it cannot verify for attorney review. It is a first-pass check, not a legal opinion.
- Extracts each claim from the copy
- Labels each claim: puffery, factual, comparative, implied or absolute
- Lists the substantiation needed for non-puffery claims
- Suggests a fix or softer rewrite for risky claims
- Flags unverified standards for attorney review
Install the marketing-claims-review skill
Download the ZIP file for the skill from the product page. Then choose one of two ways to install it.
For a personal setup, unzip the download into ~/.claude/skills/. To make the skill available only inside one project, unzip it into that project's .claude/skills/ folder instead.
In the Claude apps, you can instead upload the skill under Settings → Capabilities → Skills.
- Personal: unzip into ~/.claude/skills/
- Single project: unzip into the project's .claude/skills/ folder
- Claude apps: upload under Settings → Capabilities → Skills
Set up the required practice-level config
The skill expects a practice-level CLAUDE.md file at ~/.claude/plugins/config/claude-for-legal/product-legal/. That file should contain a 'Marketing claims standards' section. The skill reads it for your comparative claims policy, your substantiation standard and examples of claims that were rejected before.
The source file refers to this config but does not include it, so you need to write or obtain it yourself. Without it, the skill has no house rules to apply.
~/.claude/plugins/config/claude-for-legal/product-legal/CLAUDE.mdTrigger the skill with natural requests
You do not need a special command. The skill is meant to activate when you ask the agent things like 'review this marketing copy', 'check these claims', 'can we say this', or 'is this puffery or a problem', or when you paste landing page, email, ad or tagline text.
The skill also lists a command form, shown below, where the copy follows the command. The argument hint in the skill file suggests you can paste copy or give a file path.
- 'Review this marketing copy: [paste text]'
- 'Check these claims for substantiation: [paste text]'
- 'Can we say this? "Faster than Slack"'
- 'Is this puffery or a problem? [paste tagline]'
/product-legal:marketing-claims-review
[paste landing page copy]Read the output and decide what to do next
Expect a claim-by-claim list. Each entry shows the claim, its label, what substantiation it would need and, where short enough, a suggested revision. Comparative and implied claims get heightened scrutiny, so read those entries closely.
Treat the output as a checklist for your legal reviewer. Anything marked for attorney verification should be checked against primary sources before the copy ships. Keep the source citations and their tags when you pass the review along.
- Puffery: generally subjective language with no measurable content
- Factual and absolute claims: check the proof on file
- Comparative claims: confirm the policy allows them and that the data is defensible
- Implied claims: treat them with the same proof burden as express claims
Safety notes: network use and scripts
According to the skill's own description, it does not run scripts but does use the network. The skill tells the agent to look up current advertising standards, so expect web or research lookups when it runs.
The skill also refers to a legal research tool without naming one. If you connect a research tool, the skill reports thin results rather than filling gaps silently. It may offer to search the web, in which case results are tagged for verification. Do not rely on those results without checking the issuing authority.
- No scripts are run by this skill
- Network access is used for research into current standards
- Citations from model memory are tagged for verification
- Sector-specific rules are not included in the file
What people use it for
- A marketing team runs a first-pass check on a landing page before sending it to legal.
- A product marketer tests whether a line like 'saves 5 hours per week' needs study data behind it.
- A lawyer uses the claim-by-claim list as a structured starting point for a review.
- A team softens an absolute claim such as 'the only platform that does X' into a defensible version.
Frequently asked questions
Is the marketing-claims-review skill free?
The source file does not state a price or licence terms beyond the listed licence, which is Apache-2.0. Check the licence file in the source repository for the terms that apply to you. The skill also depends on Claude Code or a compatible agent runtime, which has its own requirements.
What do I need to run the marketing-claims-review skill?
You need Claude Code or a compatible agent runtime and a practice-level CLAUDE.md file with marketing claims standards at ~/.claude/plugins/config/claude-for-legal/product-legal/. A legal research tool is optional, and the skill refers to one without naming it. The skill uses the network.
Where do I install an agent skill?
Unzip the skill into ~/.claude/skills/ for personal use or into a project's .claude/skills/ folder. In the Claude apps, you can upload it under Settings → Capabilities → Skills.
Can this skill replace a lawyer's review?
No. The skill's own text says unverified standards must be checked by an attorney, and some citations come from model memory and are flagged for verification. It is a first-pass tool for copy before legal review.
Does it work for health, finance or children's products?
Not on its own. The skill mentions sector rules, but the file does not contain them, so regulated products need a specialist reviewer. The skill also refers to sector regulators in its research step, which must be checked separately.
Does it cover influencer posts and endorsements?
The file only refers to endorsement rules conditionally, so copy with endorsements or influencer content should have those steps reviewed separately.
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Our verdict
This skill suits in-house or marketing teams who want a structured first pass on copy, product marketers checking comparative or performance claims, and lawyers who want a claim-by-claim starting point. It is not a substitute for final legal sign-off, and regulated health, financial or children's products, or copy with endorsements, need a specialist reviewer instead.
Download the skill