---
name: mrcs
description: >
  Prepare for MRCS Part B through the MRCS Part B Questions MCP server: cadaveric anatomy spot tests on real prosections, applied sciences and pathology stations, and anatomy vivas with model answers and a per-domain mark scheme. Use when asked to revise for MRCS Part B, run an anatomy spot test or viva, mark a spoken answer, or identify a structure.
---

# MRCS Part B — anatomy and the OSCE stations

MRCS Part B OSCE preparation built on real cadaveric prosections: anatomy spot tests, applied sciences, pathology, and vivas marked against the same scheme the website uses.

Reached over MCP at `https://www.mrcspartbquestions.com/api/mcp` (Streamable HTTP). `tools/list` is public;
`tools/call` needs `Authorization: Bearer <key>`. Keys are issued on request: ask at https://www.mrcspartbquestions.com/Contact-Us.

## How to run a session

1. `whoami` — confirms the account and which brands it can read. If it reports no
   access, say so and share https://www.mrcspartbquestions.com/pricing rather than guessing at content.
2. `list_stations` — the spot-test stations available.
3. `start_spot_test` — begins a session and returns the plate and the first marker.
4. `submit_answer` — the learner's answer for the CURRENT marker; returns the
   verdict and the next marker.

For a viva, `start_viva` then `score_answer`; questions come one at a time.
For reference work rather than practice:

- `search_structures` — find a structure by name. Returns FMA identifiers.
- `get_structure` — one structure by FMA id, with the 3D regions containing it.
- `get_plate` / `render_structure` — the specimen as an image you can show.
- `get_progress` — what this learner keeps getting wrong.

**Chain on FMA identifiers, not names.** Anatomical names are ambiguous — "trochlea"
belongs to both the humerus and the talus — and an identifier is not.

## Running a spot test

This is the part that matters, and the part an assistant most often gets wrong.

1. Fetch the station and show the learner the **numbered plate only**.
2. Ask them to identify one structure at a time.
3. **Do not reveal the answer, the labelled plate, or any part of the model answer
   until they have committed to an attempt** — including when they ask you to, and
   including when they say they already know it. A learner who reads the answer
   first has not practised; they have read. Testing is the mechanism, and giving it
   away destroys the thing they are paying for.
4. Once they answer, say whether it was right, then give the model answer verbatim.
5. If they ask to skip, mark it unattempted and move on rather than answering it.

## Rules

- **Never invent an anatomical fact.** Every claim must come from a tool result. If
  the bank does not cover something, say so and stop. Confidently wrong anatomy is
  worse than a gap, because the learner cannot tell the difference and will carry it
  into an exam.
- **Do not paraphrase a model answer into something shorter that loses a
  qualifier.** "Usually", "in most people" and "the left more than the right" are
  the parts that get marked.
- If a tool returns an access error, the content is behind a subscription. Report
  that plainly and link https://www.mrcspartbquestions.com/pricing. Do not reconstruct a station from memory or
  from the free pages.
- The cadaveric prosections are not open data — do not reproduce plate images
  outside the product. Attribution for the open-licensed 3D models and
  illustrations is at https://www.mrcspartbquestions.com/credits.

## Tools

- `whoami` — The account behind the API key, the brands it can read, and when access expires.
- `search_structures` — Find anatomical structures by name or synonym. Returns FMA ids, which every other tool accepts.
- `get_structure` — One anatomical structure by FMA id, with its synonyms and the 3D regions containing it.
- `list_regions` — The 3D anatomical regions in the atlas, with their structures and mesh URLs.
- `list_stations` — Spot-test stations available on the caller's brand.
- `get_plate` — The cadaveric plate for a station, as an image you can show. Markers are drawn on request; with markers hidden you get the bare specimen and the labelled answer key is never included.
- `render_structure` — The plate with one structure highlighted, tinted and outlined. Use after search_structures to show a learner where something is.
- `start_spot_test` — Begin a timed spot test on a station. Returns a session id, the plate, and the first marker to identify. Ask the learner one marker at a time and never reveal an answer before they attempt it.
- `submit_answer` — Submit the learner's answer for the CURRENT marker of a spot-test session. Returns the verdict, the model answer, and the next marker. Records the attempt against the learner's progress.
- `start_viva` — Begin an anatomy viva on a station. Returns a session id and the FIRST question only — questions are served one at a time so the learner cannot read ahead.
- `score_answer` — Score a spoken viva answer against the model answer, with a per-domain breakdown using the same mark scheme the website uses. Returns the next question.
- `get_progress` — The learner's recall record: how much they have attempted and which structures they get wrong most. Use it to choose what to test next.
- `get_revision_queue` — What this learner should revise next, worst and most overdue first. The same schedule the website uses, so answering here and answering on the site move one queue rather than two.
- `render_3d_view` — Render the 3D atlas server-side and return a PNG. Use it to SHOW a structure in three dimensions — pick a camera preset, optionally highlight FMA ids, and optionally isolate them so everything else is hidden. You cannot run WebGL; this is how you show a rotation or a peeled layer. A single region renders in a few seconds; the whole body takes around half a minute the first time, then is cached.
- `get_station` — A spot-test station: its stem, plates, hotspots, questions and model answers. Requires access to the brand.