Your Spotify MCP Server

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. While it indicates this is a mutation tool ('update'), it doesn't disclose important behavioral aspects like whether this requires specific permissions, whether changes are reversible, what happens to existing settings not mentioned, or what the response looks like. The description adds minimal behavioral context beyond the basic operation.

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?

The description is appropriately sized with two clear sentences stating the purpose and scope, followed by helpful example queries. It's front-loaded with the essential information and the examples earn their place by illustrating usage. No wasted words or redundant information.

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?

For a mutation tool with no annotations and no output schema, the description provides adequate basic information about what the tool does but lacks completeness regarding behavioral aspects. It covers the purpose and parameter context reasonably well but doesn't address important mutation-related concerns like side effects, permissions, or response format.

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?

The schema description coverage is 100% with the single parameter 'timezone' well-documented in the schema. The description adds some context by mentioning 'timezone preferences' and providing example queries, but doesn't add significant semantic meaning beyond what the schema already provides about the IANA timezone format requirement.

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 clearly states the tool's purpose as updating Spotify account settings, specifically mentioning timezone preferences. It provides a specific verb ('update') and resource ('your Spotify account settings'), but doesn't explicitly differentiate from sibling tools like 'rename_account' which might also modify account information.

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?

The description implies usage context through the example queries showing when to use this tool ('Set my timezone...', 'Change my timezone...'), but doesn't provide explicit guidance about when to choose this versus alternatives like 'rename_account' or whether there are prerequisites for using this tool.

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