Most disappointing agency work does not start with a bad agency. It starts with a bad brief. An agency can only be as precise as the information it is given, and a vague brief produces a vague proposal, which produces vague work, which then gets blamed on the agency when the fault sits earlier in the process. This is a practical guide to writing a brief a good agency can actually act on.
Start with the problem, not the deliverable
The most common brief opens with a list of things the client wants made: a press release, a media list, a campaign, a spokesperson trained up. These are outputs. None of them tell an agency what problem they are solving, so the agency either guesses or asks, and if they do not ask, you get exactly what you listed and nothing more useful than that.
The difference between an objective and an output
An objective is the change you want in the world: a shift in who trusts you, who covers you, or who thinks of you first when a journalist needs a comment on your sector. An output is the thing an agency produces to get you there. A release is an output. Being the source a specialist correspondent calls first is an objective.
Compare “we need ten press releases a year” with “we want to be the source journalists call first when they write about supply chain resilience in UK retail.” The first tells an agency what to make. The second tells them what to achieve, and lets them decide whether releases, briefings, an op-ed programme or something else is the right route there. Brief the objective and let the agency propose the outputs.
What a good agency will ask you before they say yes
Even a good brief is a starting point, not a finished specification, so expect a competent agency to still ask:
- Who exactly needs to change their mind or their behaviour, and what does that change look like in practice
- What has already been tried, and what happened when it was
- Who signs off the work, and how many rounds of feedback that person or committee typically needs
- What cannot be said, for legal, regulatory or competitive reasons
- What the real budget is, not the number you think will get you the sharpest quote
- What success will be judged against in six months and in two years
If an agency accepts a brief without asking anything like this, that is worth noticing. It usually means they are pricing to win the pitch, not scoping to solve your problem.
Budget honesty
Withholding budget to see what an agency comes back with rarely produces the outcome clients hope for. An agency without a number either scopes low, so the proposal is underpowered from the first review meeting, or scopes high, so you never see the proposal because you priced yourself out without knowing it. Neither serves you.
What “we don’t have a budget yet” actually costs you
Without a figure, scoping conversations default to generic packages rather than a plan built around your problem. In a competitive pitch, agencies given no budget guidance will each guess differently, so you end up comparing proposals built on different assumptions about scale and effort. A range is enough. You do not need to disclose your ceiling, but a floor and a ceiling let an agency tell you honestly what is achievable inside it, and what the trade-offs are beyond it.
Timelines that survive contact with reality
Separate the deadline that actually matters, a product launch, a report publication, a regulatory date, from a preference for things to move quickly. Both are legitimate, but they need different handling, and conflating them is how agencies end up building unrealistic plans around a date nobody would actually miss anything by moving.
Build in time for the agency to understand your business before they perform in front of a journalist. Media training, message development and relationship building with the right correspondents all take longer than clients expect, particularly in the first few months of a new relationship.
Approval chains: the single biggest cause of missed deadlines
Name who signs off, how many rounds of review that typically takes, and whether legal or compliance need to see anything before it goes out. This matters most for reactive opportunities. A journalist on a same-day deadline will move on if your comment has not cleared a three-day internal approval chain, and no agency can outrun a process it was never told about. If your sign-off is genuinely that slow, say so at the brief stage, so the agency can plan reactive work around it, or you can make the case internally for a faster route before the relationship starts, not after the first missed opportunity.
The brief failures that produce disappointing work
These are the patterns that reliably lead to work nobody is happy with:
- A brief written as a list of tactics rather than a description of the problem, which leaves the agency executing your first idea instead of testing whether it is the right one
- No single named decision maker, so feedback arrives from five people with five different opinions and no way to reconcile them
- Success measured against something nobody agreed in advance, commonly “more buzz” or “more visibility,” which cannot be assessed and cannot be planned against
- Scope that quietly grows mid-project without the fee or timeline being revisited to match
- A restriction on what can be said or covered that only surfaces after the work has started, rather than being flagged in the brief
- Competitive pitches where different shortlisted agencies are given different levels of information, which makes the resulting proposals impossible to compare fairly
- No mention of what has already been tried and failed, so the agency proposes the same approach again
A brief you can actually use
Here is what the difference looks like in practice. “We need PR support to raise our profile” gives an agency almost nothing to work with. Something closer to the following gives them a plan to respond to:
Objective: become the reference voice on independent [topic] for UK broadcast and trade press within twelve months, specifically among the correspondents who cover our sector at the nationals and the trade titles.
Current position: two unprompted approaches from journalists in the past year, no proactive coverage secured, no spokesperson currently media-trained.
Decision maker: [named individual], with sign-off within forty-eight hours on reactive opportunities and a maximum of two review rounds on planned content.
Budget: a monthly retainer in the range of [X to Y], open to a fixed-term project structure instead if that suits the plan better.
Timeline: spokesperson trained and one proactive story in market within eight weeks, with the ongoing programme reviewed at six months against agreed measures.
Constraints: nothing on [a specific legal or regulatory topic] without sign-off from [legal or compliance], and no direct comment naming named competitors.
Notice what that version does. It states the objective, not the output. It names one decision maker and a realistic approval window. It gives a budget range instead of no figure. It states what has already happened, and flags the one constraint that would otherwise surface three weeks into the relationship. An agency can price and plan against that. They cannot price and plan against “raise our profile.”
The checklist
Before you send a brief to any agency, check it against this list:
- States the objective, the change you want, not just a list of outputs
- Names one decision maker, with any others clearly positioned as advisers, not approvers
- Sets out the approval chain and how long each round realistically takes, including legal or compliance where relevant
- Gives a budget range, even an approximate one, rather than no figure
- Distinguishes the deadline that genuinely matters from a general preference for pace
- Says what has already been tried, and what happened when it was
- Flags anything that cannot be said, covered or claimed, before work begins, not after
- Defines what success will be measured against, agreed in advance rather than decided in hindsight
- Gives every shortlisted agency the same information, if this is a competitive pitch
- Is short enough that someone could act on it without a follow-up call, and detailed enough that they would not need to guess
None of this is complicated. Most of it is deciding, before you ask an agency for help, what needs to be true in twelve months that is not true now. Everything else in the brief exists to help someone else get you there.
If you would like to talk through a brief before you send it, or want a second opinion on one you have already written, get in touch at info@comosphere.com.
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