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

No annotations are provided, so the description carries the full burden. It does disclose two meaningful traits — that delivery is a one-time action and that any link must be secure HTTPS — but it omits permission requirements, behavior when the order is unpaid, and what happens on a duplicate attempt.

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?

A single sentence that front-loads the action, the one-time constraint, and the payload fields. Every clause earns its place with no filler.

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 mutation tool with no annotations, no output schema, and undocumented parameters, the description is thin: it never addresses failure modes, preconditions, or idempotency beyond the word 'once'. Adequate to identify the tool but not to invoke it confidently.

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 compensate. It explains delivery_text and the optional delivery_url (including the HTTPS constraint), covering two of three parameters, but says nothing about order_id beyond it being the target order.

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 ('deliver'), a clearly identified resource (the result of a paid service order), and the payload fields. It distinguishes itself from siblings like get_order or close_request, though it does not explicitly name which sibling it supersedes.

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?

Usage is implied rather than stated: the order must be paid and delivery happens 'once'. There is no explicit when-to-use/when-not guidance nor a named alternative, so an agent must infer the preconditions from context.

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