send_gift_card_notification_to_customer

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

There are no annotations, so the description carries the full burden. It discloses the action (sending an email) and recipient (customer), but provides no information about side effects, prerequisites (e.g., existence of customer email), failure modes, or irreversibility. This is a significant gap for a side-effecting tool.

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, well-formed sentence that directly states the action and recipient. It is front-loaded with the verb and contains no unnecessary 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?

The tool is a mutation (sends an email) with no annotations and no output schema. The description is too terse to cover crucial context such as return value, potential errors, or dependencies on customer contact info. For a comparable mutation tool, this is insufficient.

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?

The input schema already provides a complete description for the sole parameter ('Gift Card ID') with 100% coverage. The tool description adds no further meaning beyond implying the gift card is used to identify the customer, so the schema baseline of 3 applies.

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 uses a specific verb ('Send') and resource ('gift card notification email') and clearly specifies the recipient as 'the customer associated with the gift card'. This distinguishes it from the sibling tool 'send_gift_card_notification_to_recipient', which likely targets the gift card recipient instead.

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 description implies usage for notifying the customer, which is differentiated by the sibling tool name. However, it does not explicitly state when to prefer this over the recipient variant, nor does it provide any exclusions or conditions of use.

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