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

Annotations already establish the safety profile (readOnlyHint=false, destructiveHint=false, idempotentHint=true, openWorldHint=false), so the bar is lower, and the description still adds real context: it copies a source card, prints the recipient's name, and starts a song 'where possible' (implying the song may not always be produced). It does not mention auth requirements or that generation is asynchronous, but the return contents and the copy semantics are disclosed.

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 dense sentences, front-loaded with the core action and followed by the return payload; no filler. Slightly crowded, but every clause carries 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 no output schema, the description usefully enumerates the return values (card_id, private preview link, colors, print prices), and the schema covers the async wait/poll semantics. The main remaining gap is that it never explains how this fits relative to order_card or create_share in the workflow.

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%, with the enum and the wait_seconds repeat-call behavior documented in the schema itself, so the baseline is 3. The description only indirectly touches parameters (the song/name printing hints at music_genre and recipient_name) without adding syntax or constraint detail beyond the schema.

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 ('Makes the user's own copy of a find_cards card for one recipient') and names the sibling that supplies the source card, so an agent can separate it from find_cards and from the ordering tools without opening a schema. It also summarizes the resulting artifact (printed names, a song, preview link, prices).

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 mention of 'a find_cards card' implies the pick-then-choose flow, but there is no explicit when-to-use versus the downstream siblings order_card or create_share, and no statement of prerequisites. Usage is inferable rather than stated.

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