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DualStream MCP Server

DualStream MCP Server

by DualStream
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

Switch scene

activate_scene
Idempotent

Change the live stream scene immediately by specifying a scene ID or exact name. Override the default transition optionally for a custom cut or fade.

Instructions

Switch DualStream's live output to another scene. Takes effect immediately on the user's live stream; call only when the user asked for a scene change. Identify the scene by scene_id (preferred, from get_scenes) or by exact scene_name (case-insensitive). Optional transition name overrides the scene's default transition.

Tool call template

This tool declares no required parameters. Add optional parameters from the input schema as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {},
    "name": "activate_scene"
  }
}

Input Schema

NameRequiredDescriptionDefault
scene_idNoStable scene UUID from get_scenes. Preferred over scene_name.
scene_nameNoExact scene name (case-insensitive); resolved via get_scenes.
transitionNoOptional transition override (e.g. "Cut", "Fade", "Automagic").

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

A4.2/5.0
Behavior4/5

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

Adds behavioral context beyond annotations: 'Takes effect immediately on the user's live stream' and the call-only condition. Annotations already indicate mutation (readOnlyHint=false) and idempotence (idempotentHint=true), which the description does not contradict.

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

Conciseness5/5

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

Three sentences, front-loaded with the main action. Each sentence adds distinct information: what, when, and how. No filler or redundant content.

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

Completeness4/5

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

Covers the tool's purpose, usage condition, and parameter identification in a compact way. With no output schema, no return description is needed. Slightly incomplete in not explicitly stating that scene_id or scene_name should be provided, but this is implied by the wording.

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

Parameters3/5

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

Schema descriptions already fully document all three parameters with 100% coverage. The description restates 'scene_id (preferred, from get_scenes)' and 'exact scene_name (case-insensitive)', adding minimal new meaning beyond the schema. No additional semantics like mutual exclusivity are provided.

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

Purpose5/5

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

Description opens with a specific verb and resource: 'Switch DualStream's live output to another scene.' This clearly differentiates from sibling tools like get_active_scene (read) and create_scene (new scene), and scopes the action to the live stream.

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

Usage Guidelines4/5

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

States an explicit trigger: 'call only when the user asked for a scene change.' Also gives param preference: scene_id preferred from get_scenes, or exact scene_name. Does not explicitly name alternative tools for other operations, but the call-only condition serves as a clear exclusion.

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

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