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

With no annotations, the description carries the disclosure burden and does disclose auth context ('No API key required') and the returned content (where to send ADA, and how much). It stops short of explicitly confirming read-only/no side effects or describing response format, but the auth and payload disclosures go meaningfully beyond the name.

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 short sentences with the ordering constraint front-loaded immediately after the colon. The opening clause ('Everything you need before your first call') is slightly promotional, but no sentence is wasted and the actionable content leads.

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 zero-parameter bootstrap tool with no output schema and no annotations, the description supplies the essentials: when to call it, that it needs no credentials, and what it returns. It could note whether the returned address/amount is stable or per-session, but nothing critical to invoking it is missing.

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 tool takes zero parameters, so there is nothing for the description to disambiguate; the baseline of 4 applies. The description correctly implies a pure parameterless call rather than suggesting any inputs.

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 states the resource and its payload concretely: the ADA destination address and amount, positioned as a bootstrap/pre-flight lookup. The verb is only implied by the tool name, but the content is specific enough that an agent knows what it gets back and how it differs from 'register'.

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 explicitly sequences the call ('call this first, before register') and names the sibling it must precede, which is exactly the routing an agent needs. It also removes a prerequisite question by stating no API key is required.

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