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sommus-laptop

by Jashan-Mshadow
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Local

media_control

Control playback of music or videos across apps: play, pause, toggle, skip next or previous track. Use when asked to pause, stop, play, resume, or change media.

Instructions

Play, pause or skip whatever is playing (Spotify, Music, YouTube in a browser...).

Args:
    action: "pause" and "play" do exactly that (use these when asked to pause, stop, play or resume);
        "play_pause" toggles; "next" and "previous" skip tracks.

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": {
      "action": "<action>"
    },
    "name": "media_control"
  }
}

Input Schema

NameRequiredDescriptionDefault
actionYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

A3.8/5.0
Behavior3/5

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

Annotations declare readOnlyHint=false and destructiveHint=false, so the safety profile is already covered and the description is not contradicted. The description adds the useful scope fact that it acts on 'whatever is playing' across multiple apps, but says nothing about what happens when no media is active or whether the action reports success.

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

Conciseness4/5

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

Front-loaded one-line summary followed by a compact action breakdown; every sentence earns its place with no filler. The parenthetical app list is slightly verbose but useful for identifying scope.

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?

For a single-parameter, non-destructive tool with no output schema, the description covers purpose, action semantics, and intent mapping adequately. The only meaningful gap is failure/no-media behavior, which is minor given the tool's simplicity.

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 description coverage is 0%, so the description carries the burden, and it delivers: it maps all five enum values to meaning, including the non-obvious mapping of user requests for 'stop' and 'resume' onto pause/play. This is meaning the enum alone cannot convey, though it adds no format or default details.

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?

States a concrete verb set (play, pause, skip) plus the resource it controls, and disambiguates the target with examples like Spotify, Music, and YouTube in a browser. It is clear what the tool does, though it never names the read-side sibling get_now_playing, so sibling differentiation is implicit rather than stated.

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?

Gives an explicit intent mapping — use pause/play 'when asked to pause, stop, play or resume' — which is exactly the routing information an agent needs. It does not, however, state any when-not conditions or point at alternatives such as get_now_playing for status checks.

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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