Favorite asset collection

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

Annotations already declare readOnlyHint=false, destructiveHint=true, idempotentHint=false, openWorldHint=true, so the safety profile is covered. The description adds that the favorite is scoped to the authenticated user's library, which is useful context, but it does not explain the required confirm=true flag or the effect of the destructive/non-idempotent hints.

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?

A single front-loaded sentence with no filler; the verb-resource-scope structure is efficient and immediately parseable.

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 annotations covering the mutation safety profile and a fully documented schema, the description is adequate but thin: it omits the mandatory confirm requirement and any note on idempotency/retry behavior that would matter for a non-idempotent write. No output schema exists, so return values need not be described.

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 account, confirm, collection_id, and Idempotency_Key. The description contributes nothing about parameter meaning, so the baseline 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?

States a specific verb (favorite) and resource (asset collection) plus the scope (authenticated user's fal Assets library). It is clearly distinguishable from siblings like unfavorite_asset_collection or create_asset_collection through the verb alone, though the description does not explicitly name those alternatives.

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?

No when-to-use or when-not-to-use guidance is given; the reader must infer that this applies only to collections not already favorited. The obvious sibling unfavorite_asset_collection is never referenced as the counterpart operation.

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