Most business owners treat the job description as a checkbox \u2014 something to write quickly before posting a role. But what goes into that document has a direct effect on who shows up to interview, how long they stay, and how much it costs you when they don’t.<\/p>\n
The problem isn’t usually that owners don’t care. It’s that the job description gets written by the wrong people, with the wrong inputs, in a hurry \u2014 and then it stays that way for years.<\/p>\n
A job description has two jobs: attract the right candidates and set accurate expectations for what the role involves. Most fail at both \u2014 often at the same time.<\/p>\n
The most common failure is inaccuracy. The description lists what someone imagines the role should require, rather than what a person will actually spend their time doing. Certifications get added because they sound serious. Tasks get included because they might come up someday. Requirements borrowed from a similar posting get pasted in unchanged. The result is a document that no longer describes the actual job.<\/p>\n
This creates two separate problems. The first shows up at the top of the funnel: an inflated requirements list puts off qualified candidates before they apply. Descriptions with 20 or more listed requirements consistently reduce application rates \u2014 particularly among people who don’t tick every box but would be good at the job.<\/p>\n
The second problem shows up after the hire. When the role doesn’t match what the candidate was told to expect, they leave. A Jobvite survey found that around 30% of new hires exit within the first 90 days, with expectation mismatch cited as the cause 43% of the time. A separate survey of 1,500 workers found that nearly half who quit within three months pointed to a disconnect between the actual role and what was described when they applied.<\/p>\n
I’ve seen this play out repeatedly. People arrive and find they’ve taken a job that bears little resemblance to what they applied for. They don’t leave because they can’t do the work \u2014 they leave because it wasn’t what they were led to expect. And from what I’ve observed, much of what ends up in a typical job description doesn’t reflect what someone will actually spend their days doing. The real job is often a fraction of what’s on the page.<\/p>\n
The financial cost adds up fast. Replacing a single employee costs between 50% and 200% of that person’s annual salary, according to Gallup and SHRM. For a small business, one early exit can mean tens of thousands of dollars in recruiting, training, and lost productivity \u2014 before the next hire even starts.<\/p>\n
A third problem is structural: the wrong people are often writing the description. HR departments understand compliance and format, but they may have limited visibility into what the role actually requires day to day. When the line manager \u2014 or the person already doing the job \u2014 isn’t part of the process, the description reflects what HR thinks the role looks like. That’s not always the same thing.<\/p>\n
An accurate job description narrows the gap between who applies and who stays. It acts as a pre-screening tool: candidates who read an honest description self-select more accurately, which means fewer wasted interviews and more people who are genuinely suited to the role.<\/p>\n
People who hire well apply a few consistent principles.<\/p>\n
Lead with what the person will actually do.<\/strong> Responsibilities should reflect the real daily work, not an aspirational version of the role or a copy of the previous posting. If a task only comes up occasionally, omit it or label it clearly as secondary.<\/p>\n Separate what’s required from what’s preferred.<\/strong> A shorter list of genuine requirements attracts more qualified applicants than a long list of everything that would be nice to have. A useful distinction: what the person needs on day one, versus what can be developed in the role.<\/p>\n Bring in the person closest to the work.<\/strong> The line manager, or a team member in the same role, should be involved in drafting or reviewing the description. HR provides structure and compliance knowledge. The subject matter expert provides accuracy. Both are needed; neither alone is enough.<\/p>\n Keep the description proportionate.<\/strong> A shorter, clearer description consistently outperforms a longer one in both application quality and candidate fit. People make quick decisions about whether to apply. A description that buries the essential role inside a long requirements list loses them before they finish reading.<\/p>\n Review before each posting.<\/strong> Roles evolve. A description written two years ago for a position that has since changed will attract the wrong people. The review doesn’t need to be long \u2014 it just needs to happen.<\/p>\n Getting the right people involved.<\/strong> Line managers are busy. The person doing the job is rarely consulted. HR ends up writing in isolation, or lightly revising whatever was used last time. Even a short conversation \u2014 20 minutes with the right person \u2014 can dramatically improve accuracy.<\/p>\n Resisting the wish list.<\/strong> Every hiring manager has a mental picture of the ideal candidate. That picture tends to be comprehensive. The challenge is leaving out everything the ideal person might bring and describing only what the role actually requires.<\/p>\n Keeping descriptions current.<\/strong> Roles shift, but descriptions often don’t. A description written when someone was hired two years ago may no longer reflect what the role has become \u2014 especially in positions that have taken on new responsibilities over time.<\/p>\n Balancing completeness and clarity.<\/strong> Some roles genuinely involve a wide range of work. The challenge is representing that without producing a document that discourages good candidates from applying.<\/p>\n AI is useful at the drafting and trimming stage. Given clear inputs about what the role actually involves, AI can produce a well-structured first draft quickly. It can also flag language that may put off candidates, suggest plain-language replacements for jargon, and help identify where a requirements list has grown out of proportion.<\/p>\n Where AI falls short is equally important to understand. These tools are trained on existing job descriptions \u2014 many of which have exactly the problems described above. Ask AI to write a description without specific inputs, and it will likely produce something generic that mirrors the worst of what already exists: inflated requirements, vague responsibilities, borrowed language that doesn’t describe your role.<\/p>\n The approach that works is to use AI second, not first. The person closest to the role answers a set of structured questions about what the job actually involves. That input is then handed to AI to shape into a clear, readable description. A prompt along these lines gives the AI what it needs:<\/p>\n “I am hiring for [role title]. The person will primarily be responsible for [list the two or three core responsibilities]. They will report to [title]. In a typical week, they will spend most of their time on [describe the actual daily work]. The minimum qualifications needed are [genuine requirements only]. Based on this, write a concise job description that is clear, accurate, and does not add requirements or tasks that were not listed above.”<\/p><\/blockquote>\n The draft that comes back should be reviewed by HR for compliance, and by the line manager for accuracy, before it goes to a job board.<\/p>\n AI should not be left to decide what the role requires. It cannot know what the job involves, who the team is, or what the working conditions look like. Those things have to come from inside the business.<\/p>\n This exercise produces a complete, postable job description built from accurate inputs about what the role genuinely involves. The AI draws out the real responsibilities, requirements, and expectations through structured questions \u2014 and if you have an existing description, it checks that against what you tell it and flags anything that no longer applies or overstates what the role requires.<\/p>\n Copy the complete prompt below into a new AI conversation and send it as your message. Do not upload it as an attachment without also telling the AI to run it.<\/p>\n Having the following information available will make the exercise easier:<\/p>\n If you are starting from nothing and don’t yet have answers to all of these, the AI will work through them with you.<\/p>\n Job description builder<\/p>\nChallenges<\/h3>\n
How AI Can Help<\/h3>\n
Key Takeaways<\/h3>\n
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Build a job description that reflects the actual role<\/h2>\n
What This Exercise Helps You Do<\/h3>\n
What to Have Available<\/h3>\n
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Copy-and-Paste AI Prompt<\/h3>\n