resume

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It reveals the core state change (starting/resuming playback) but does not mention failure modes, idempotency, what happens with no active device, or other side effects. More detail would be needed for a playback-control tool.

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 communicates the action and target with no filler. Every word adds meaning, and the structure does not bury important information.

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 zero-parameter tool with an output schema, the description states the essential action, but it omits practical context around device availability and error conditions. The sibling tools suggest that activate_device may need to be called first, but the description itself does not guide the agent through that sequencing.

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 tool has zero parameters and schema coverage is complete, so there are no parameter meanings for the description to clarify. The baseline of 4 applies because nothing is omitted; the only context it adds is the target device, which is part of the action description.

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 uses a specific verb pair, 'Resume/start', and names the exact resource: playback on the user's active Spotify device. This clearly differentiates it from sibling tools like pause, skip_next, or activate_device.

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 phrase 'on the user's active Spotify device' implies the precondition that an active device must exist and that the tool is for starting/resuming playback. However, it does not explicitly tell the agent when to prefer this over pause or how to handle the absence of an active device, leaving the usage context implied rather than stated.

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