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walter-kai

Spotify MCP Server

by walter-kai

spotify_get_saved_tracks

Retrieve tracks saved in the current user's Spotify library, with limit and offset options for browsing or paginating results.

Instructions

Get tracks saved in the current user's library

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
limitNoNumber of tracks to return (default: 20)
offsetNoIndex of first track to return (default: 0)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.2.4

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 implies a read-only library fetch via 'saved' and 'current user', but says nothing about pagination, ordering, return shape, or auth requirements. For a no-annotation tool this is a notable gap.

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?

A single tight sentence with no filler, and the resource scope is front-loaded. It is efficient, though the extreme brevity is what leaves the other dimensions thin.

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?

For a simple two-optional-param read tool with full schema coverage and no output schema, the description is minimally adequate. But with zero annotations, it should have noted the read-only nature and pagination behavior.

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%, with limit and offset both documented in the schema including defaults and bounds. The description adds nothing beyond the schema, so the baseline 3 applies.

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 ('Get') and resource ('tracks saved in the current user's library'), which clearly distinguishes it from spotify_get_saved_albums and spotify_get_playlists by resource type. However, it never explicitly names or contrasts a sibling, so it falls short of the 5 bar.

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?

The description gives no when-to-use context, no prerequisites (e.g. user auth), and no alternatives or exclusions. An agent must infer usage from the name alone, which is minimal guidance.

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