> ## Documentation Index > Fetch the complete documentation index at: https://docs.semicola.com/llms.txt > Use this file to discover all available pages before exploring further. # Glossary > Every term used across the Semicola docs, in alphabetical order, with a short definition. Terms are grouped by letter. Where a term has its own page, the definition links to it. ## A ### Account A workspace that owns data and members. An account is a **buyer**, a **seller** or a **partner**, and can sit under an **organization** that holds billing. One person can belong to several accounts and switch between them; over MCP, `get_status` lists the ones you can reach and `switch_account` moves between them. ### AdCP The Ad Context Protocol, an open protocol for buying and selling advertising between agents. It defines products, proposals, media buys, creatives and delivery reports, and runs over MCP. Semicola speaks AdCP to every seller. ### Advertiser The brand a buyer purchases media for (see [Advertiser](/buy/advertiser)). It carries the brand card (logo, colors, tone), a primary currency that locks after the first campaign, preferred countries and channels, and whether it is a sandbox advertiser. ### Agent of record Semicola's role in every transaction: it sits between buyer and seller, carries each request, and keeps the trail of who asked for what and who approved it. ### AI Business Rules A seller's written acceptance policy (Brief acceptance and Creative policy) plus its two approval gates. See [AI Business Rules](/sell/ai-business-rules). ### Allocation The share of a proposal's budget assigned to one product, with the role it plays in the plan and a rationale. ### Approval gate A seller setting that decides whether a person reviews incoming work first. There are two: `creativeApproval` and `mediaBuyApproval`, each `auto` or `manual`. ## B ### Brief A plain-language description of what a campaign needs: goal, audience, channels, budget, flight and constraints. A buyer writes one brief; Semicola sends it to every eligible seller. ### Brief acceptance The part of AI Business Rules that says which advertisers, categories and briefs a storefront takes. ## C ### Campaign The unit of media planning: a brief, flight, budget, targeting, creatives and the media buys that carry them out. See the [Campaign object guide](/buy/campaign). ### Confirmation A pause before a risky write, such as launching a campaign or approving a buy. The tool returns `pending_confirmation` with a summary; the write happens only after the person approves. ### Counter-pitch A proposal where the seller cannot meet part of the brief and offers the closest thing it can do instead, with the limitation stated. ### Creative A finished ad: assets placed into a format's slots, plus copy and a click URL. Creatives are attached to campaigns and synced to sellers at launch. ### Creative policy The part of AI Business Rules that says what creative a storefront accepts. ## D ### Demand inbox A seller's ledger of every brief its storefront answered, with metrics and results. See [Demand inbox & proposal pass](/sell/demand-inbox). ### Disposition Whether a proposal is a `pitch` (meets the brief) or a `counter_pitch` (offers an alternative). ### Draft A campaign in `DRAFT` status. It works as a cart: you can stage media buys on it without contacting any seller. ## E ### Execution One run of `request_proposals`: the fan-out of a brief to every eligible seller, with a status of `running`, `complete`, `partial` or `failed` and a per-seller result. ## I ### Idempotency key A string of 16 to 255 characters that you choose for a write. Sending the same key again returns the first result instead of repeating the write. Reuse a key only for a retry of the same attempt. ### Inventory source Where a storefront's inventory actually lives: an AdCP sales agent the seller already runs, or an ad server connection. ### IU (Intelligence Unit) The unit Semicola bills for intelligent work, such as one brief response composed by a storefront agent. Prices are published before you act. Semicola takes no share of media. ## L ### Listing How buyers see a storefront: description, channels, countries, logo and links. A storefront can run as a listing only, passing briefs to its own sales agent. ## M ### MCP The Model Context Protocol. It lets an agent discover and call tools on a server. Semicola's v3 MCP endpoint is `https://api.semicola.com/mcp/v3`. ### MCP App An interactive widget a tool can open in hosts that support MCP Apps. Semicola widgets are pages (full views), tasks (a job with a finish line) and glances (a small summary). ### Media buy One AdCP transaction with one seller in one currency. A campaign usually holds several. ## N ### needs\_input A tool result that asks a question instead of failing, because a required fact is missing. Answer it and call the tool again. ## P ### Package One product inside a media buy, with its own budget, pacing, bid price, flight and creatives. ### Pacing How spend is spread across a flight: `EVEN`, `ASAP` or `FRONTLOADED` on a campaign; `even`, `asap` or `front_loaded` on a package. ### Playbook A seller's instructions for its storefront agent: how to pitch, package and price, including hard floors, anchor prices and discount caps. The agent never prices below a floor. ### Product Something a seller sells, with channels, formats, a delivery type and one or more priced options. ### Proposal A seller's priced answer to a brief: products, allocations, budget guidance, limitations and the reasoning behind them. Proposal ids start with `sfp1:`. ### Proposal pass The complete, unchangeable record of one response to a brief. See [Demand inbox & proposal pass](/sell/demand-inbox). ## R ### Refine Asking a seller to revise a proposal: keep or drop products, shift budget, or add instructions. ### Revision A counter on every versioned object. Writes send `expectedRevision`; if someone else changed the object first, the write fails with `REVISION_CONFLICT` instead of overwriting. ### RFP A durable record of one brief a storefront received, whether from a live buyer, entered by hand, imported from history or used for practice. Its responses are turns. ## S ### Sandbox An advertiser mode for running the full buying loop without real spend. Set when the advertiser is created and never changed. ### Semi The assistant built into the Semicola app. It works through the same tools described in the [v3 Tool Catalog](/v3/tool-catalog). ### Semicola Exchange The platform and API layer underneath Semicola: the MCP endpoint, the REST API and the per-seller AdCP endpoints. ### Storefront A seller's presence on Semicola: listing, inventory sources, products, playbook, library, rules and an optional storefront agent. ### Storefront agent The hosted agent that reads buyer briefs and composes priced proposals for a storefront, inside the seller's playbook and AI Business Rules. ## T ### Turn One request and one response on an RFP. A finished turn never changes; revising creates a new turn linked to its parent. ## W ### Widget See [MCP App](#mcp-app).