spotify_featured_charts_by_country

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

With no annotations, the description carries the full burden. It correctly implies a read operation ('Retrieve') and notes a default behavior (CHARTS content shelf). However, it does not elaborate on whether the tool is purely read-only, potential side effects, or any rate limits or permissions needed.

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?

Two concise sentences with no redundancy. The main action is front-loaded, followed by necessary detail about the return type and default behavior. Every sentence serves a purpose.

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 retrieval tool with optional parameters, the description is adequate but not thorough. It lacks details about the output format (since no output schema is provided) and doesn't address edge cases like invalid country codes or content IDs. Given the sibling set, it could benefit from brief comparisons.

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 coverage is 100% (both parameters have descriptions). The description adds minimal value beyond the schema: it mentions the default value for content_id and uses similar language for country_code. Baseline 3 is appropriate.

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 retrieves Spotify featured charts by country, with a specific verb and resource. It also distinguishes from general Spotify search tools by specifying 'normalized country hub content' and defaulting to the CHARTS shelf, though it does not explicitly differentiate from similar sibling like spotify_popular_by_country.

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 is provided on when to use this tool versus alternatives, such as spotify_popular_by_country or other chart tools. There are no usage constraints, prerequisites, or contraindications mentioned.

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