--- title: Skill Descriptions Are Tricky | daily.dev description: When defining skills for AI agents or LLM-based systems, the description field should function as trigger keywords rather than a full explanation of what the... canonical: https://daily.dev/posts/skill-descriptions-are-tricky-4zefxzdye twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Skill Descriptions Are Tricky | daily.dev og:description: When defining skills for AI agents or LLM-based systems, the description field should function as trigger keywords rather than a full explanation of what the... og:url: https://daily.dev/posts/skill-descriptions-are-tricky-4zefxzdye og:image: https://api.daily.dev/og/posts/4ZEfXZdyE.png og:image:alt: Skill Descriptions Are Tricky og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Skill Descriptions Are Tricky **[Theo - t3․gg](https://daily.dev/sources/t3dotgg)** · 1 min read · 0 upvotes · 0 comments ## Summary When defining skills for AI agents or LLM-based systems, the description field should function as trigger keywords rather than a full explanation of what the skill does. Since descriptions are always injected into the model context regardless of whether the skill is invoked, overly detailed descriptions waste tokens and can even make the skill redundant. The right approach is to use concise, targeted keywords that signal to the model when to invoke the skill. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How should I write skill descriptions for an LLM agent so the model knows when to use them? Skill descriptions should act as trigger keywords rather than detailed explanations. Because the description is always inserted into the model's context whether or not the skill is being used, a verbose description wastes tokens and can even make the skill unnecessary — the model gets all the information it needs without ever invoking it. Use concise keywords that signal to the model when to pull the skill in. _Developers fine-tuning agent skill definitions track patterns like this on daily.dev._ ## Similar posts on daily.dev - [Writing and Reviewing Agent Skills - Common Pitfalls](https://daily.dev/posts/writing-and-reviewing-agent-skills---common-pitfalls-liuwqgi1b) · Sam McLeod · 0 upvotes · 0 comments --- Tags: [#llm](https://daily.dev/tags/llm), [#ai-agents](https://daily.dev/tags/ai-agents), [#prompt-engineering](https://daily.dev/tags/prompt-engineering) [View this post on daily.dev](https://daily.dev/posts/skill-descriptions-are-tricky-4zefxzdye) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Skill Descriptions Are Tricky","url":"https://daily.dev/posts/skill-descriptions-are-tricky-4zefxzdye","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/skill-descriptions-are-tricky-4zefxzdye"},"datePublished":"2026-08-11T17:03:51.103Z","dateModified":"2026-08-14T21:04:30.890Z","description":"When defining skills for AI agents or LLM-based systems, the description field should function as trigger keywords rather than a full explanation of what the...","image":"https://i.ytimg.com/vi/P2Jb1lOkzCE/sddefault.jpg","thumbnailUrl":"https://i.ytimg.com/vi/P2Jb1lOkzCE/sddefault.jpg","isAccessibleForFree":true,"articleSection":"Theo - t3․gg","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Theo - t3․gg","logo":"https://media.daily.dev/image/upload/s--UmX7IyU3--/f_auto/v1704628081/logos/t3dotgg.jpg","url":"https://daily.dev/sources/t3dotgg"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/skill-descriptions-are-tricky-4zefxzdye","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"llm,ai-agents,prompt-engineering","timeRequired":"PT1M","video":{"@type":"VideoObject","name":"Skill Descriptions Are Tricky","description":"When defining skills for AI agents or LLM-based systems, the description field should function as trigger keywords rather than a full explanation of what the...","thumbnailUrl":"https://i.ytimg.com/vi/P2Jb1lOkzCE/sddefault.jpg","uploadDate":"2026-08-11T17:03:51.103Z","duration":"PT1M","url":"https://api.daily.dev/r/4ZEfXZdyE","embedUrl":"https://www.youtube.com/embed/P2Jb1lOkzCE"}} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Theo - t3․gg","item":"https://daily.dev/sources/t3dotgg"},{"@type":"ListItem","position":3,"name":"Skill Descriptions Are Tricky"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/skill-descriptions-are-tricky-4zefxzdye#faq","mainEntity":[{"@type":"Question","name":"How should I write skill descriptions for an LLM agent so the model knows when to use them?","acceptedAnswer":{"@type":"Answer","text":"Skill descriptions should act as trigger keywords rather than detailed explanations. 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