repeat_mode

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

With no annotations provided, the description must carry the full behavioral burden. It does disclose the core behavior and meaningful mode semantics, but it does not disclose what happens without an active device, whether authorization/premium is required, or error behavior.

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 tightly worded sentence front-loads the purpose, and the parameter details are compactly structured as a short inline list. Every sentence earns its place.

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 single-parameter setter with an output schema present, the description is mostly complete. It could more explicitly require an active device or note prerequisites, but the mention of 'active Spotify device' plus the full mode semantics covers the essential information an agent needs.

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%, so the description fully compensates by explaining the only parameter, mode, and defining each allowed value ('track', 'context', 'off') with its behavioral meaning. This is excellent parameter-level guidance.

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 ('Set'), names the resource ('the user's active Spotify device'), and precisely defines the operation (repeat mode). The three valid modes are enumerated, so an agent knows exactly what this tool does and can distinguish it from playback siblings like shuffle, pause, resume, or skip_next.

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 clearly sets the usage context: set repeat mode on the active Spotify device. It assumes an active device is already active, which is implied context, and no exclusion is needed since no sibling tool competes for this exact action.

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