playlist_symmetric_difference

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

No annotations are present, so the description carries the burden of behavioral disclosure. It reveals quota cost ('🟢 2 GETs'), which is useful, but says nothing about whether results include only track IDs, whether the operation respects max_results, how ordering is determined, or what edge-case behavior exists (e.g., duplicate tracks within a playlist).

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 short sentences with zero filler. The core XOR semantics are front-loaded and the quota hint is a compact bonus. Every word 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 read-only playlist comparison among ~700 siblings, the description defines the core operation cleanly and notes quota. It does not state the return shape—whether the agent should expect full track objects or just IDs—and does not address duplicates or ordering. With no output schema available, that omission is a realistic gap.

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 coverage is 50%; the two required ID parameters have no descriptions in the schema, and the description does not elaborate on them beyond the tool name. However, their meaning is essentially self-evident from the tool name and description. max_results and response_format are described in the schema, so the partial gap does not create confusion.

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 a specific verb and resource: 'Tracks in exactly one of two playlists (XOR).' This distinguishes it from related playlist set-operation siblings like playlist_intersect, playlist_union, and playlist_subtract, though it doesn't explicitly name them. The term 'XOR' adds mathematical precision.

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 XOR definition implicitly conveys when to use it: when the user wants items exclusive to one playlist versus the other. It does not explicitly state alternatives or exclusions, but the set-operation framing is clear enough among the many playlist sibling tools that an agent can route correctly.

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