get_currently_playing

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

With no annotations, the description carries the full burden of behavioral disclosure. It does not mention any side effects, prerequisites, authentication requirements, or edge cases such as returning null or no content when nothing is playing. The description only states the action without sufficient context.

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, clear sentence that front-loads the primary purpose. There is no redundancy, fluff, or unnecessary detail.

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, the tool has two optional parameters and no annotations. The description is too minimal to fully equip an agent to use the tool correctly, especially regarding parameter semantics and edge cases like no active playback. The description does not compensate for the lack of schema documentation.

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 two optional parameters (market and additional_types) with no descriptions, and schema description coverage is 0%. The description does not explain these parameters, leaving the agent without any guidance on their meaning or usage.

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 it gets the currently playing track or episode on the user's Spotify account, using a specific verb and resource. This distinguishes it from sibling tools like play, pause, and search_song, which serve different actions.

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 when current playback information is needed, but it does not explicitly state when to use this tool versus alternatives or provide any exclusion criteria. Since no sibling tool retrieves currently playing content, the lack of explicit alternatives is acceptable, but the guidance is still minimal.

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