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

Annotations declare readOnlyHint=false and destructiveHint=false, so the write nature is already flagged. The description adds useful behavior beyond that: it updates status from pending_mint to redeemed and persists the mint transaction hash. It does not mention permissions, idempotency, or edge cases.

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 a single efficient sentence, front-loading the prerequisite ('After the merchant submits...') before the action and state transition. No wasted words.

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 simple two-parameter state-transition mutation with full schema coverage and safety annotations, the description is sufficient to invoke correctly. Minor omissions like idempotency behavior or failure modes keep it from being fully complete.

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 both parameters are already documented in the schema. The description reinforces that the certificate is claimed and the transaction hash is the mint tx hash, but it adds little syntax or meaning 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?

The description gives a specific verb and resource: 'mark it as minted' for a claimed gift certificate. It also states the exact state transition (pending_mint -> redeemed), which clearly distinguishes this from siblings like confirm_mint_fee or list_mints.

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 trigger is explicit: call this 'after the merchant submits the on-chain mint transaction for a claimed gift certificate.' That gives clear usage context, though it does not name alternatives or state when not to use the tool.

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