Unfavorite asset character

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

Annotations already declare destructiveHint=true, idempotentHint=false and openWorldHint=true, so the safety profile is covered. However, the description adds nothing beyond restating the title, and it leaves a real ambiguity: with destructiveHint=true, an agent may reasonably wonder whether this removes the character itself rather than just the favorite marking. Clarifying that only the favorite status is removed would have been valuable context.

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 or redundancy. It is efficient, though the brevity is part of why guidance and behavioral context are missing.

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 one-required-parameter mutation with no output schema, the annotations carry the safety profile and the schema fully documents the parameters, so the description is minimally sufficient. It still omits what the confirm parameter implies about user intent verification and what happens if the character was not favorited, leaving the destructiveHint ambiguity unaddressed.

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 four parameter descriptions are substantive (e.g. account is a 'private account key profile label', confirm is 'set true only when the user asked for exactly this action'). The description contributes no additional 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?

The description names a specific verb (unfavorite) and a specific resource (asset character), and scopes it to the authenticated user's fal Assets library. It is clearly distinguishable from the collection/asset variants (unfavorite_asset, unfavorite_asset_collection), though it never explicitly references the inverse sibling favorite_asset_character.

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 when-to-use guidance, no prerequisites, and no mention of the obvious alternative (favorite_asset_character) or the generic unfavorite_asset. The agent must infer that this is the inverse of a favorite operation on the same entity type.

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