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

Annotations already establish that this writes (readOnlyHint=false), is non-idempotent, non-destructive and closed-world. The description adds genuinely new behavior: the 20,000-character cap, the multi-part submission path, and an email fallback when the channel is limited — none of which appear in the annotations. It does not say what confirmation or response the caller receives, so not a 5.

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 sentence with the trigger front-loaded before the mechanics, and no filler. The nested parenthetical about character limits and the email address makes it slightly dense, but every clause carries operational 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?

For a six-parameter submission tool with no output schema, the description covers size limits, chunking, fallback contact and usage restraint. What remains unstated — whether feedback is anonymous or what the agent should report back after sending — is a modest gap rather than a blocking one.

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 coverage is 83%, so the schema already documents mtl, ref, part, parts, type and message. The description reinforces the message length and the 'longer in parts' mechanism, which helps explain the non-obvious ref/part/parts grouping, but adds no format or naming detail beyond the schema. Baseline 3 is appropriate.

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 core action is stated concretely: 'send the team a short note', plus the three triggering situations (something sounded wrong, tool confusing, feature missing). That is enough to separate it from the audio-oriented siblings (song, sfx, render, convert), though no sibling is named to confirm the boundary.

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 explicit positive triggers ('when something sounded wrong, a tool was confusing, or a feature is missing') and a restraint clause ('Quiet and occasional; never nag the user') that tells the agent how often to invoke it. It stops short of naming an alternative destination for non-feedback issues, so it falls just below the top band.

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