playlist_intersect

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

With no annotations provided, the description carries the full behavioral disclosure burden. It usefully discloses atomic overwrite semantics, read-only behavior when no target is given, and quota cost (N GETs + 1 PUT when committing). It does not detail failure modes or the exact plan structure returned, but the disclosed mutation behavior is transparent.

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?

The core explanation is compact and front-loaded, and the quota note is useful. However, the ending 'Also covers: playlist_intersection (same op, unified) — See also: playlist_intersection' is redundant and confusing, undermining the otherwise efficient structure.

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?

The description, combined with the detailed input schema, covers the operation, source/target semantics, read-only vs. commit behavior, dedupe option, dry-run flag, and quota. The ambiguous relationship with playlist_intersection and lack of output-structure hints are the only noticeable gaps, but they do not prevent correct invocation.

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 all six parameters well. The description reinforces key semantics like 2–10 source playlists and target-driven overwrite, but it adds little beyond what the schema already states.

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 states a specific verb and resource: keep only tracks present in ALL of 2–10 playlists, written as one atomic replace. It also explicitly distinguishes this from the other set operations (union/subtract/XOR), making the tool's purpose immediately clear among many playlist siblings.

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 provides clear context: use this for intersection, with the read-only vs. committing behavior determined by whether a target playlist is provided. It names related set-op siblings (union/subtract/XOR) and references playlist_intersection, though it does not explicitly state when not to use this tool over that sibling.

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