get_user_friends

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

Annotations already cover read safety (readOnlyHint, idempotentHint, non-destructive), so the description adds value by explaining that user defaults to the authenticated account and that recenttracks enriches the response. It does not disclose auth requirements, rate limits, or error behavior, but these are less critical given the strong 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.

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

A one-line purpose followed by a compact Args block. Every sentence contributes operational detail, and there is no fluff or repetition of schema 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 simple read-only tool with annotations and an output schema, the description is complete: it covers purpose, all parameters, defaults, pagination, and the one optional behavior flag. Nothing essential for invoking the tool correctly is missing.

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%, so the description carries the full burden for parameter meaning. It documents all four parameters in plain language: user scope, pagination fields, and the recenttracks enrichment flag. It does not give constraints like ranges, but the schema provides types and defaults.

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 verb and resource: 'Get a user's friends.' This distinguishes it from sibling tools that fetch tracks, albums, tags, or charts, though it does not explicitly call out any sibling alternative.

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?

There is no guidance on when to use this tool versus the 54 sibling get_* tools, nor any mention of exclusions or alternative tools. The argument defaults are helpful, but the agent must infer when this is the right choice from the name alone.

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