spotify_get_time_remaining_ms

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

Describes return format (number as text). With no annotations, more behavioral context is needed, such as preconditions (must have active playback) or error states (returns -1 or undefined if no track). The description does not disclose these, leaving gaps for an AI agent.

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?

Two concise sentences, front-loaded with purpose. Every word earns its place: 'ONLY', 'perfect for countdown timers' add immediate value without redundancy.

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 zero parameters, no output schema, and no annotations, the description covers basic purpose, return format, and a use case. It omits error scenarios or requirement for active playback, but for a simple read-only getter it is largely complete.

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, and schema coverage is 100% (empty). The description adds no param info, but baseline 4 applies due to zero parameters. The description correctly implies no input needed.

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?

Clearly states the tool retrieves 'time remaining in the current track in milliseconds', distinguishing it from sibling tools like spotify_get_track_progress_ms (elapsed time) and spotify_get_time_remaining_formatted (formatted output). The verb 'Get' and resource are specific and unique among 50+ sibling tools.

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?

Explicitly says 'perfect for countdown timers' indicating a primary use case. The word 'ONLY' sets clear scope. However, no explicit when-not-to-use or alternative tools are mentioned (e.g., spotify_get_track_progress_ms for elapsed time).

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