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

Annotations already declare readOnly, idempotent, non-destructive, open-world, so the safety profile is covered; the description adds the meaningful behavioral fact that uploaded files lack a recipe and therefore cannot satisfy this call. It does not say what that failure looks like (error vs. empty result), a minor remaining gap.

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 sentences, front-loaded with what is read, followed by eligibility and the alternative. No filler and every clause carries either scope, field, or routing information.

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 safety, the description need only cover scope and edge cases, which it largely does. The only omission is the concrete outcome when a sound has no recipe, which an agent would need to branch on.

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 audioId parameter already documents itself plus its provenance (r3_sound_create or r3_audio_list). The description adds no further meaning about the id format or scoping, 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 (read) and a precisely-scoped resource (the recipe/editable source a sound was made from), then enumerates the returned fields. It is clearly distinguished from r3_sound_update, which acts on the same resource differently.

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?

Gives positive applicability (the account's own sounds or anyone's public one), an exclusion with a reason (an uploaded file has no recipe), and explicitly routes mutation intent to r3_sound_update. An agent can decide use vs. not-use without inference.

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