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ElBeldu

Spotify MCP Server

by ElBeldu

saveOrRemoveAlbumForUser

Save albums to or remove them from a Spotify user's Your Music library. Provide an action and up to 20 album IDs.

Instructions

Save or remove albums from the user's "Your Music" library

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
actionYesAction to perform: save or remove albums
albumIdsYesArray of Spotify album IDs (max 20)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

C2.9/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full behavioral burden. It conveys mutation of a user library but says nothing about auth requirements, idempotency, whether remove is reversible, or what happens on partial failure — meaningful gaps for a write 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?

A single front-loaded sentence with no redundant clauses or filler. Every word earns its place.

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?

For a mutating, un-annotated tool with no output schema, the description should cover side effects, permissions, or confirmation behavior. It leaves all behavioral context unstated, so the definition is not complete enough to invoke confidently.

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 both parameters (albumIds with max 20, action enum) are already fully documented in the schema. The description adds nothing beyond the schema, making the baseline 3 appropriate.

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 specific verb pair (save/remove) and resource (albums) and names the destination library ("Your Music"), so the operation is clear. It does not explicitly distinguish itself from siblings like checkUsersSavedAlbums, which is the natural read counterpart.

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 when-to-use guidance, no mention of the read-side alternative checkUsersSavedAlbums, and no conditions distinguishing save from remove beyond what the enum already implies. The agent is left to infer usage entirely.

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