get_play_state

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

The readOnlyHint annotation already communicates safe read-only behavior; the description adds only the generic statement that it returns 'Object with play state info.' It does not disclose what fields or states are included, nor how playback state relates to playing, paused, stopped, or recording states. There is no contradiction with the annotation.

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 short and front-loaded with the core action: 'Get the current playback state.' The 'Returns: Object with play state info' sentence adds minimal return-type context and is slightly redundant, but the overall description remains appropriately sized.

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 low complexity of a zero-parameter, read-only getter, the description is minimally usable. However, with no output schema, the vague 'Object with play state info' leaves the return shape ambiguous, and no usage context is provided relative to related state getters.

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?

This tool has zero parameters and 100% schema coverage because the input schema is empty. With no parameters to document, the description has no semantic burden to carry, and the zero-parameter baseline applies.

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 states a clear verb and resource: 'Get the current playback state.' This distinguishes it from action-oriented siblings like play, pause, and stop, and from position-specific get_play_position. However, it does not explicitly differentiate it from other state getters such as get_repeat_state, so it is clear but not fully sibling-aware.

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 like get_play_position, get_repeat_state, or the play/pause/stop controls. The description only states what the tool does, leaving selection to be inferred from the name and sibling list.

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