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

Goes well beyond the annotations: it discloses that the tool only drafts (returns sent:false), explains why (Apple's public API cannot send or read reviewer messages), and specifies the required human workflow. This is exactly the kind of behavioral context annotations cannot convey, and it is consistent with readOnlyHint=true and destructiveHint=false.

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?

Three tight, front-loaded sentences with no wasted words; the scope constraint and the not-this clauses are efficiently placed. Minor vagueness in 'the correct app handoff' keeps it from being flawless.

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, return values need not be explained, yet the description still clarifies the sent:false behavior. Combined with annotations covering safety and a fully documented schema, nothing an agent needs in order to call this correctly is missing.

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 each of the three parameters is already fully documented, and the description adds no syntax, format, or constraint detail beyond what the schema provides. The baseline of 3 applies when the schema does the heavy lifting.

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 and resource ('Prepare YOUR authored reply to Apple App Review') and immediately names what it is NOT (not a public customer-review response, not a change to reviewer notes), which distinguishes it from siblings like update_review and get_review.

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 clear negative guidance by excluding the public-review and reviewer-notes use cases, and states the human must paste and send in App Store Connect. It stops short of an explicit 'use X instead when Y' routing to a named sibling, 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.