Control media source

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 lists the actions but does not specify effects beyond their names, nor does it mention error conditions, side effects, or whether source existence is required. The description is too sparse for a control operation.

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 highly concise, consisting of two short sentences. It front-loads the main purpose and then lists actions, with no redundant or filler content.

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 two-parameter tool, the description is minimal but somewhat sufficient. Yet it omits any usage context, error behavior, or distinction from sibling tools, which is especially relevant given the large number of related controls. The presence of an output schema reduces the need to describe return values, but overall the description feels incomplete.

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 no descriptions (0% coverage), but the description compensates by enumerating the valid action values (PLAY, PAUSE, STOP, RESTART, NEXT, PREVIOUS). However, 'source_name' is only vaguely described as a media/VLC source, lacking format or validation details.

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 indicates the tool's function with specific verbs (play, pause, stop, restart, skip) and identifies the resource (media/VLC source). It lists all supported actions, making the purpose unambiguous and distinct from sibling tools like set_media_time which focus on seeking.

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. It does not mention exclusions, prerequisites, or how it relates to sibling media controls. The agent is left to infer usage from the action list alone.

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