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Spotify MCP Server

Spotify MCP Server

by Ackberry
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Hybrid

play_track

Play a specific Spotify track by name, optionally specifying the artist or playback device for precise control.

Instructions

Play a specific track by name and optional artist

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": {
      "trackName": "<trackName>"
    },
    "name": "play_track"
  }
}

Input Schema

NameRequiredDescriptionDefault
trackNameYesName of the track to play
artistNameNoOptional artist name to help find the track
deviceIdNoOptional device ID to play on

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations, the description carries the full burden but provides minimal behavioral insight. It mentions playing a track but doesn't disclose effects (e.g., interrupts current playback, requires active device, authentication needs, or rate limits). This is inadequate for a mutation tool with zero annotation coverage.

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?

The description is a single, efficient sentence with zero waste. It is appropriately sized and front-loaded, directly stating the tool's purpose without unnecessary elaboration.

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

Completeness2/5

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

Given the tool's complexity (a mutation operation with no annotations and no output schema), the description is insufficient. It lacks details on behavioral traits, return values, error handling, or how it interacts with sibling tools, leaving significant gaps for an AI agent.

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 parameters. The description adds marginal value by implying that artistName helps disambiguate tracks, but doesn't provide syntax or format details beyond what the schema offers. Baseline 3 is appropriate as the schema does the heavy lifting.

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 description clearly states the action ('Play') and resource ('a specific track'), with additional context about identification by name and optional artist. It distinguishes from siblings like play_album or play_playlist by focusing on individual tracks, though it doesn't explicitly contrast with play_random_song or control_playback.

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

Usage Guidelines2/5

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

No guidance is provided on when to use this tool versus alternatives like play_album, play_playlist, play_random_song, or control_playback. The description implies usage for playing a known track, but lacks explicit context, prerequisites, or exclusions.

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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