Get Media Sessions

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

With no annotations provided, the description must carry the behavioral disclosure burden. It lists the output contents but does not say whether the operation is read-only, whether device defaults to the active device, what include_system changes, or whether any side effects occur. Basic output information is present, but behavioral context is largely missing.

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 terse sentence with no filler and the core resource is front-loaded. However, it is so abbreviated that it reads like a fragment rather than a complete sentence, and it omits parameter context. Still, the structure itself is efficient.

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 description leaves the two optional parameters unexplained and provides no usage context or behavioral notes. It is minimally acceptable for a simple getter, but for a tool that accepts a device selector and an include_system flag, the description is 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?

Schema description coverage is 0% and the description does not mention either parameter, device or include_system, at all. The parameter names offer limited hints, but the description adds no meaning about device targeting or what including system sessions would mean. This is a significant gap.

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 identifies the resource (media sessions and music volume) and the specific payload fields (app, playback state, title/artist), which clearly distinguishes it from sibling control tools like media_control or volume_up. It lacks an explicit verb like 'retrieves' or 'returns', but the tool name supplies the action, so the purpose is still clear.

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 given about when to use this tool versus siblings such as media_control, volume_up, or get_device_status. The description implies it is a read action, but it does not state exclusions, prerequisites, or alternative conditions.

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