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

Annotations already declare readOnlyHint=false, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds the prerequisite that both confirmations are required, which is genuine context, but it says nothing about consequences (e.g. whether approval locks or freezes the design) or what is returned. Nothing contradicts the 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?

Two sentences, front-loaded with the core action and followed by the invocation context. No filler, though the proof-viewer button detail is arguably UI trivia rather than tool semantics.

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 four-parameter mutation tool with no output schema, the description covers when to call it and the key precondition, which is reasonable. It leaves the quantity parameter and the post-approval effects undocumented, so an agent still lacks a full picture.

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 0%, so the description must carry the load. It implicitly explains the two boolean confirmations ('requires both confirmations') and alludes to the design via 'draft design', but the quantity parameter is never mentioned at all, leaving one of four parameters with no semantics anywhere.

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 gives a specific verb and resource: 'Records the buyer's approval of a draft design.' That is clear enough to distinguish it from read-only siblings like get_design_status or generate_proof, but it never names a sibling or explicitly contrasts its role, so it falls short of the top mark.

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?

It states the triggering context (the proof viewer's Approve button) and the precondition that the buyer has ticked both the proof approval and logo rights checkboxes. It gives no explicit when-not-to-use guidance or alternative path, but the usage context is unambiguous.

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