Favorite asset character

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

Annotations already declare readOnlyHint=false, destructiveHint=true, idempotentHint=false and openWorldHint=true, so the safety profile is largely carried by structured data. The description adds nothing about reversibility (unfavorite exists), the confirm=true gate for mutation, or how favoriting affects existing collections, leaving a mutation described in one neutral sentence.

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 repetition. It is efficient, though arguably under-specified rather than optimally concise for a mutating tool.

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-param mutation with no output schema, the schema and annotations cover most structured needs, but the description omits the confirm requirement's purpose, reversibility, and any pointer to the unfavorite counterpart. Minimum-viable rather than complete.

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%, including the confirm and account semantics, so the baseline of 3 applies. The description adds no extra meaning about character_id format or how account scoping interacts with the authenticated user.

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 character) scoped to the authenticated user's fal Assets library, which is enough to distinguish it from unfavorite_asset_character and the other character tools. It stops short of naming the sibling it replaces, so differentiation relies on the verb alone.

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 guidance on when to use this versus unfavorite_asset_character, list_asset_characters, or edit tools, and no prerequisites such as the required confirm=true flag or idempotency-key usage. The reader must infer all of that from the schema.

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