Toggle play

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

The description discloses that the tool toggles between play and stop, which is a mutation (consistent with readOnlyHint=false). It adds the context of mirroring the spacebar but does not mention return values or side effects beyond playback state.

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?

A single, front-loaded sentence that efficiently conveys the tool's function with a helpful analogy. No wasted words.

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 tool's simplicity (no parameters, clear purpose), the description is fully complete. It provides enough context for an agent to understand its role among sibling tools.

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?

No parameters exist, so the description does not need to add parameter details. Schema coverage is 100%.

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 verb 'Toggle' and the resource 'play and stop', and distinguishes itself from siblings like fl_play and fl_stop by using the analogy of the spacebar.

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 implies usage for switching playback state, mirroring the spacebar behavior, but does not explicitly state when not to use it or compare with fl_play/fl_stop.

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