search_within_playlist

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

With no annotations provided, the description carries the full disclosure burden, and it delivers meaningful behavioral context: 'client-side filter over full item walk' reveals the operation fetches and filters all items locally, and the quota note ('🟢 GET /playlists/{id}/items paged') discloses the underlying API, cost tier, and pagination behavior. This goes well beyond what the input schema communicates, though it stops short of an explicit read-only/safety statement.

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 sentences with zero waste — the core purpose is front-loaded, and the quota/mechanism note adds high-value context in a compact parenthetical and a short second sentence. 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 5-parameter tool with no output schema and no annotations, the description covers the essentials: what it does, how it implements the search, and its quota cost. Minor gaps remain (no explicit statement that the operation is read-only, no caveat about large playlists or how max_results interacts with the full item walk), but the 100% schema coverage compensates for most missing detail.

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 all five parameters (query, market, max_results, playlist_id, response_format) are already documented in the schema; the baseline of 3 applies. The description's 'client-side filter' phrase modestly reinforces the query parameter's substring-matching semantics but adds no syntax or default details beyond the schema.

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 ('Text search'), a precise resource ('a single playlist'), and a scope constraint ('inside a single playlist') that clearly separates it from catalog-wide search siblings like search_tracks, search_advanced, and search_fresh. The parenthetical '(client-side filter over full item walk)' further clarifies the mechanism, making the tool's purpose unambiguous.

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 single-playlist scope implies when an agent should choose this over global catalog searches, but the description never explicitly names alternatives or states when-not-to-use. Context is implied rather than stated — an agent must infer that this is for filtering one playlist rather than searching the catalog or querying saved tracks (search_saved_tracks).

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