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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds useful domain context by naming the three preset categories and where their values belong in the payload, but says nothing about result size, completeness, or whether the list is account-scoped or static.

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?

One sentence, front-loaded with the core action, then the enumeration. Slightly dense with repeated parenthetical field paths, but no filler and no redundancy.

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 an output schema present and annotations covering the read-only profile, the description only needs to convey what the tool enumerates, which it does across all three categories. The remaining gap is the absence of any hint about consuming the results, which would have made it fully self-sufficient for a discovery tool.

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% and the single optional 'search' parameter is documented in the schema with examples ('anime, pixar'). The description contributes nothing about how search matches across the three preset families, so the baseline of 3 applies.

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 definition gives a specific verb and resource ('List the style presets of Revid's create form') and enumerates the three returned families, mapping each to the field it populates (media.mediaPreset for moving-image/ai-video, media.mediaPreset for motion-graphics, captions.preset for captions). It is clearly not confusable with siblings such as list_voices or list_music_tracks, though it never names a sibling explicitly.

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?

There is no statement of when to call this versus alternatives, no prerequisite, and no indication of what the returned values are subsequently used for (e.g. as input to a create-form or generate_media call). An agent must infer the use case entirely from the name.

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