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

Annotations already provide destructiveHint=true and readOnlyHint=false, so the description's statement 'Consumes Wubble requests or credits' adds useful context about cost. However, it does not disclose whether edits are reversible, what happens to the original track, or any side effects. The description adds moderate value beyond annotations.

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?

The description is extremely concise at two sentences, with the first sentence stating the purpose and the second adding a behavioral note. Every word earns its place, and there is no wasted text. It is front-loaded and efficient.

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?

Despite having 6 parameters, a destructive hint, and an output schema, the description is too minimal. It does not explain what 'edit region' means, how to use upload_audio_id, or the significance of source_duration_ms. The output schema exists but is not referenced. A more complete description is needed for proper tool invocation.

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 all parameters are already documented in the schema. The description does not add any additional meaning, such as clarifying the relationship between edit_start and edit_end or how track_id relates to other parameters. Baseline 3 is appropriate given full schema coverage.

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 clearly states the verb 'Edit' and the resource 'Wubble track', making the tool's purpose immediately understandable. It also adds the behavioral note about consuming requests/credits, which is helpful. However, it does not differentiate this from sibling tools like wubble_remix_song or wubble_generate_track, which could also modify tracks.

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?

The description provides no guidance on when to use this tool vs. alternatives. There is no mention of prerequisites (e.g., having a track_id), when it's appropriate to edit vs. generate a new track, or any exclusions. With 27 sibling tools, this is a significant gap.

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