Meaning for - Terms of Reference and/or Context that both describe your brief and can be reviewed at any time for clarity.

Meaning for - Terms of Reference and/or Context that both describe your brief and can be reviewed at any time for clarity.

https://en.wikipedia.org/wiki/Terms_of_reference 

Terms of reference describe the purpose and structure of a project, committee, meeting, negotiation, or any similar collection of people who have agreed to work together to accomplish a shared goal. The terms of reference of a project are often referred to as the project charter.
Terms of reference show how the object in question will be defined, developed, and verified. They should also provide a documented basis for making future decisions and for confirming or developing a common understanding of the scope among stakeholders. In order to meet these criteria, success factors/risks and constraints are fundamental. They are very important for project proposals.
Creating detailed terms of reference is critical, as they define the:

• Vision, objectives, scope and deliverables (i.e. what has to be achieved)
• Stakeholders, roles and responsibilities (i.e. who will take part in it)
• Resource, financial and quality plans (i.e. how it will be achieved)
• Work breakdown structure and schedule (i.e. when it will be achieved)

They should include:

• Success factors/risks and constraints.

https://www.google.ca/#q=context+meaning

con·text
ˈkäntekst/
noun
noun: context; plural noun: contexts
the circumstances that form the setting for an event, statement, or idea, and in terms of which it can be fully understood and assessed.
"the decision was taken within the context of planned cuts in spending"

synonyms: circumstances, conditions, factors, state of affairs, situation, background, scene, setting More

"the wider historical context"
frame of reference, contextual relationship;
text, subject, theme, topic

"a quote taken out of context"

the parts of something written or spoken that immediately precede and follow a word or passage and clarify its meaning.
"word processing is affected by the context in which words appear"

http://web.uvic.ca/~sdoyle/E302/Notes/WritingBriefingNotes.html

"Briefings, whether in the form of briefing notes, longer briefing papers, or oral briefings, are used to keep decision makers informed about the issues they are responsible for. In government, briefings are the principal means of communication between government managers and their ministers (or other senior officials).
The demands of government these days are such that senior officials must constantly learn and retain information about an enormous range of topics and issues, which change rapidly. The only way they can do this is to rely on concise, clear, reliable briefings"