Toggles play/pause on the active media player, optionally targeting a specific player by name.
Toggle play/pause on the active media player
| Name | Required | Description | Default |
|---|---|---|---|
| player | No | Specific player name (optional) |
Changes observed during successful MCP inspections.
v2.0.0Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false and destructiveHint=false, so the mutation/safety profile is covered. The description adds one genuinely useful behavioral detail — that it acts on the *active* player by default — but says nothing about what happens when no player is active or about the toggle's stateful nature.
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?
One front-loaded sentence with zero filler; every word carries meaning for a tool this simple.
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 one-param, no-output-schema toggle this is nearly sufficient; only the no-active-player fallback is missing. Nothing about return values is needed since no output schema exists.
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 coverage is 100% and the single optional `player` param is documented in the schema, so the baseline is 3. The phrase "active media player" implicitly clarifies the default when `player` is omitted, a small but real addition.
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?
States a specific verb+resource ("Toggle play/pause on the active media player") that an agent can map directly to an action. It does not explicitly distinguish itself from media_stop/media_next/media_seek, but the verb itself is unambiguous.
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 when-to-use guidance and no alternatives named; the agent must infer from sibling names that media_next/media_previous/media_stop are the non-toggle counterparts. No prerequisite or no-active-player behavior is stated.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.