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

Annotations already declare readOnlyHint=true, openWorldHint=true, and destructiveHint=false, so safety is covered. The description adds genuinely useful non-annotation context: results are in playlist order, 30 videos per page, and billing is $0.006 per page. It does not mention rate limits or error/auth behavior, but the cost and ordering disclosures are strong value-adds.

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?

Three tight sentences with zero filler; the core action, the input constraint, and the cost/pagination facts are front-loaded. Every sentence carries distinct information.

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?

With no output schema, the description compensates by tying returned fields to tiktok_user_videos and stating the page size, and it discloses pricing. Relying on a sibling for the exact field list is a reasonable pointer, though a tool with no output schema could specify a bit more about the return shape.

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 four parameters including the exactly-one url/playlist_id constraint. The description largely restates that constraint and adds only the implicit page size (30 per page) context, so it does not meaningfully exceed 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?

States a specific verb and resource ('Get a TikTok playlist's videos in playlist order') and scopes it to the playlist entity, which cleanly separates it from tiktok_playlist_details (playlist metadata) and tiktok_user_videos (a user's videos). The reference to tiktok_user_videos for field parity further disambiguates the output.

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?

Gives a concrete input rule ('provide exactly one' of url or playlist_id) that tells the agent how to invoke it. It implies use-cases clearly but does not explicitly say when to prefer tiktok_playlist_details or another sibling over this tool, nor any exclusions.

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