A vague brief is one of the most common sources of frustration on both sides of a development project — the client feels like the result isn't quite what they wanted, and the developer feels like they delivered exactly what was asked for. Both can be true at once, and it almost always traces back to how the original brief was written.
The most useful shift is moving from describing a feature in the abstract to describing it as a specific scenario. Instead of "we need a contact form," describe the actual moment: a visitor lands on the page having just read about your pricing, fills in three fields, and receives a confirmation within a few seconds — versus a form that also needs to route different enquiry types to different team members. The specific version leaves far less room for misinterpretation than the abstract one.
Screenshots and examples do a huge amount of work that words alone struggle to convey. If a layout, an interaction, or a tone from another site resonates with you, sharing it directly — even from a completely unrelated industry — communicates intent faster and more precisely than trying to describe it purely in text.
It's also worth being explicit about constraints, not just desires. Budget ceilings, must-launch-by dates, or non-negotiable requirements like accessibility or specific integrations all shape the right technical approach, and surfacing them early prevents a design or architecture decision from being made that later has to be unwound once a constraint surfaces mid-project.
A good developer will ask clarifying questions regardless of how detailed the initial brief is — but the more specific and concrete that starting brief, the fewer rounds of back-and-forth it takes to converge on something that actually matches what was in your head at the start.
If writing a detailed brief feels daunting, it doesn't need to happen alone — a good development partner will help turn a rough idea into something concrete through a proper discovery conversation, rather than expecting a perfect brief to arrive fully formed before any discussion begins.