spotify_authenticate

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. It mentions OAuth 2.0, which implies a standard authentication flow, but fails to detail critical aspects like whether this initiates a user consent flow, returns tokens, handles token storage, or has rate limits. This leaves significant gaps in understanding the tool's behavior.

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 a single, efficient sentence that directly states the tool's purpose without any wasted words. It is appropriately sized and front-loaded, making it easy for an agent to quickly grasp the core function.

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?

Given the complexity of an OAuth authentication tool with no annotations and no output schema, the description is insufficient. It doesn't explain what the tool returns (e.g., access tokens, error handling), how it integrates with sibling tools, or the authentication flow details, making it incomplete for effective agent use.

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 input schema has 100% description coverage, clearly documenting both parameters (client_id and client_secret). The description adds no additional meaning beyond what the schema provides, such as explaining where to obtain these credentials or their format. With high schema coverage, the baseline score of 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 action ('Authenticate') and the service ('with Spotify'), and specifies the authentication method ('using OAuth 2.0'), which provides a specific verb+resource combination. However, it doesn't explicitly distinguish this authentication tool from potential sibling tools that might also involve authentication or authorization processes, keeping it from a perfect score.

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 provides no guidance on when to use this tool versus alternatives, such as whether it's for initial setup, token refresh, or specific API calls. It lacks context about prerequisites or exclusions, leaving the agent to infer usage based on the tool name alone.

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