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

Annotations already cover the safety profile (readOnly, idempotent, non-destructive, closed-world), so the bar is lower. The description still adds real behavior: each entry carries a preview, and no source footage from the person is required, which shapes whether the agent needs import_media first.

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 compact clauses with no filler: the catalog contents are front-loaded and the next action plus the 'no own clip' clarification follow immediately. Every phrase 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 catalog tool with no output schema, the description conveys what comes back (trends with previews) and what to do next. The only gap is pagination behavior, which the schema's cursor and limit fields cover but the description never mentions, so an agent may not realize results are paged.

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 67%, with topic already enum-documented in the schema. The description's category list mirrors the topic enum values, adding a little semantic grounding, but it says nothing about limit or cursor-based paging, leaving those entirely to 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?

Names a concrete resource (ready-made remake Trends) and enumerates the categories (dances, talking clips, reveals, transitions, product shots, sport, couple), which lets an agent tell it apart from remake_start and preview_remake_cast. The browsing verb is implicit rather than stated ('Ready-made Trends to remake'), leaning on the title to supply 'Browse', which keeps it just short of a 5.

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 states the follow-on action ('Pick one and remake_start it'), routing the agent to the correct sibling after browsing. It also removes a likely blocker with 'no clip of the person's own needed.' It stops short of a 5 because it never says when browsing is unnecessary (e.g., if you already know the trend ID or the user supplied footage).

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