spotify_repeat

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

With no annotations, the description carries the full burden. It does explain the observable effect of each mode value (repeat track, repeat album/playlist, disable), which is genuine behavioral disclosure for a state-mutating tool, but it omits permissions/auth needs, whether an active device or playback session is required, and how device_id changes targeting.

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 maps each enum value to its effect with zero filler. Every clause 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 simple 2-parameter mutation with no output schema, the core semantics are covered, but the absence of annotations and of any note on session/device prerequisites or failure modes leaves meaningful context gaps.

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 100%, so the schema already documents both parameters and the enum values. The description's restatement of the three modes adds no meaning beyond the schema, so the baseline 3 applies; device_id receives no added explanation.

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 (Set) plus resource (repeat mode) and enumerates each mode's behavior, so the agent knows exactly what the tool does. It does not differentiate itself from the adjacent spotify_shuffle sibling, which also toggles a playback mode, so it falls short of a 5.

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?

There is no when-to-use guidance, no mention of prerequisites such as an active playback session, and no routing to or away from siblings like spotify_shuffle or spotify_transfer_playback. Usage is only implied by the action itself.

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