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OBS MCP

OBS MCP

by Tom-R-Main
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Rust
Hybrid

Create Input

obs-create-input

Add a new input to a scene by specifying its name, kind, and optional settings, enabling scene configuration through natural language.

Instructions

Creates a new input, adding it as a scene item to the specified scene

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "sceneName": "<sceneName>",
      "inputName": "<inputName>",
      "inputKind": "<inputKind>"
    },
    "name": "obs-create-input"
  }
}

Input Schema

NameRequiredDescriptionDefault
inputKindYesThe kind of input to be created
inputNameYesName of the new input to created
sceneNameYesName of the scene to add the input to as a scene item
canvasUuidNoUUID of the canvas containing the scene
inputSettingsNoSettings object to initialize the input with
sceneItemEnabledNoWhether to set the created scene item to enabled or disabled

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.1.1

TDQS

A3.7/5.0
Behavior3/5

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

Annotations already mark this as non-read-only and non-idempotent; the description adds useful context that the new input also appears as a scene item in the target scene. It does not disclose failure conditions, default item enabled state, or the effect of inputSettings, but annotations lower the transparency burden.

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?

One well-formed sentence, front-loaded with the verb and object, no filler or redundancy.

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

Completeness3/5

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

Given six parameters and a nested inputSettings object, the description plus the well-described schema is minimally sufficient, but it offers no guidance on how to determine inputKind values or structure settings. No output schema exists, so return-value documentation is not required.

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 description coverage is 100%, so the schema already documents all six parameters. The description's mention of 'scene item' and 'specified scene' reinforces sceneName/inputName but adds no parameter-level meaning beyond what the schema provides.

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?

The description clearly states the specific action — creating a new input — and its notable side effect of adding it as a scene item to the named scene. The resource type 'input' distinguishes it from sibling creation tools such as obs-create-scene-item and obs-create-scene.

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

Usage Guidelines3/5

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

The description implies the use case: when you need a new input placed into a scene. However, it provides no explicit when-not-to-use guidance or alternative tool names, so the usage context is implied rather than fully directive.

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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