services_media_play_pause

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

The description only says 'Toggle play/pause' but does not disclose behavioral details such as state changes, potential side effects, or response behavior. Without annotations, the description should provide more insight but fails to do so.

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 very short (one sentence) and front-loaded, but it is under-specified. It is concise but missing essential details, earning a middle score.

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 single required parameter and absence of annotations or output schema explanation, the description is incomplete. It does not explain what kind of media player, where to find entity_id, or what the tool returns.

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 one required parameter 'entity_id' with no description in the schema (0% coverage). The description does not mention this parameter, leaving the user to infer that it identifies the media player. This adds no value beyond the schema.

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 ('Toggle play/pause') and the resource ('on a media player'). It is specific and distinguishes from sibling tools like 'services_media_seek' or 'services_set_volume'.

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. There is no mention of prerequisites, such as the entity must be a media player, or when not to use it (e.g., if seeking or volume adjustment is needed).

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