Skip to main content
Glama
ProjectMakersDE

horizOn MCP Server

Official
by ProjectMakersDE
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Remote

Advance Match Timeout

horizon_advance_match_timeout
DestructiveIdempotent

Advance an asynchronous match timeout using the exact original revision to keep multiplayer state consistent. Requires session token and userId; returns match state and next poll timing.

Instructions

Executes advance match timeout under the exact original revision. Use when: explicit asynchronous multiplayer actions after reading horizon://docs/matches. Not for: automatic polling, page traversal, timeout progression, invented winners or automatic rewards. Reconcile with horizon_get_matches and horizon_get_match. Consent and game consensus do not validate honest gameplay. Requires: userId and the player's session: sign in with horizon_signin_email or horizon_signin_anonymous and pass its accessToken as sessionToken. Side effects: One HTTP attempt. Start requires the creator and every joined UUID exactly once. Turn requires the current unexpired actor. Timeout advances only one turn. Active leave forfeits without selecting a winner. Lobby cancel is creator-only. Full Inbox retains a durable notice without undoing a committed move. Returns: {match,pollAfterSeconds,serverTime}; departing lobby actors receive metadata only and lose point-read access. Errors: 404 hides private/missing/expired matches. 409 REVISION_CONFLICT or STATE_CONFLICT: explicitly reread and reconcile the original intent, never replace the revision or automatically resubmit. RESULT_CONFLICT preserves the original report. RUN_EXPIRED/RUN_ALREADY_USED never allow replacement ranked runs. 501 FEATURE_NOT_SUPPORTED is explicit for simpleServer ranked mode. 401 means the session is missing or expired: sign in again and retry with the new accessToken. 403 for a session means the token belongs to another user: pass the userId that signed in. Needs HORIZON_API_KEY. Every failure returns an error result (isError) with the HTTP status and body: a 401 that horizon_test_connection also returns means HORIZON_API_KEY is wrong, 429 means the account's per-minute rate limit was reached (wait a minute, then retry).

Input Schema

NameRequiredDescriptionDefault
userIdYesActive player matching the session and project
matchIdYesOriginal server match UUID in the selected project
sessionTokenYesPlayer accessToken sent only as Bearer
expectedRevisionYesOriginal reviewed revision; never substitute a newer revision after an uncertain write

Schema Changelog

Changes observed during successful MCP inspections.

  1. Addedv1.9.1

TDQS

A4.4/5.0
Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Beyond annotations, it discloses one HTTP attempt, auth/session requirements, revision-conflict handling, side effects, return fields, rate limits, and error semantics. This is exactly the kind of behavioral context an agent needs for a destructive open-world mutation.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

It is well organized with front-loaded Use/Not for/Requires/Side effects/Returns/Errors sections. But it is long and includes start, turn, leave, cancel, and Inbox side effects that do not obviously belong to advancing a match timeout, so not every sentence earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness5/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a destructive open-world mutation with no output schema, it covers auth, return shape, conflicts, rate limits, and key failure modes. The agent has enough to call correctly, even if scope wording could be tighter.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the baseline is 3. The description adds useful semantics for sessionToken (pass accessToken as Bearer) and expectedRevision (original reviewed revision, never substitute), though matchId remains schema-only.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The opening sentence names a specific operation and revision constraint: execute an advance match timeout under the original revision. However, it does not clearly differentiate this tool from siblings like horizon_start_match, horizon_submit_match_turn, or horizon_leave_match, and later sentences mention those sibling behaviors, muddying scope.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It gives explicit 'Use when' and 'Not for' conditions and points to horizon_get_matches and horizon_get_match for reconciliation. The exclusion of automatic polling and the auth setup are concrete guidance for selecting and invoking the tool.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Deploy Server

Other Tools