spotify-mcp

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

With no annotations provided, the description carries the full burden of behavioral disclosure but fails to explain what 'following' entails (e.g., adding to the user's library, enabling notifications, or playlist updates). It does not mention idempotency, side effects, or the existence/structure of the output schema.

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

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

While the description is brief (3 words), it is under-specified rather than efficiently concise. No information is front-loaded because no substantive information is present; the brevity reflects a lack of content rather than editorial discipline.

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

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

Despite having an output schema (reducing the need to describe return values), the description remains incomplete due to zero parameter documentation and no behavioral context. For a single-parameter mutation tool without annotations, the description should explain the parameter format and mutation effects.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 0% (playlist_id lacks a description), and the tool description does not compensate by explaining the expected format (Spotify ID vs URI), where to obtain the ID, or constraints. The parameter is entirely undocumented beyond its name.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Follow a playlist' is tautological—it merely restates the tool name without adding specificity. It fails to distinguish this tool from siblings like spotify_follow_artists or spotify_follow_users, leaving the agent to infer the resource type from the name alone.

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

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

No guidance provided on when to use this versus alternatives (e.g., spotify_save_tracks or spotify_add_to_playlist). The description lacks prerequisites (e.g., whether the playlist must be public) and excludes failure modes or authorization requirements.

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