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

Annotations already declare readOnly/idempotent/non-destructive/closed-world, and the description adds genuinely new context: the auth mechanism (API key from wallet signature, Bearer header) and the important one-way fact that the secret is never returned again. It stops short of describing ordering, pagination, or empty-list behavior.

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 compact sentences with the purpose front-loaded and the auth constraint appended. The field enumeration is dense but each item is informative; the only minor cost is that the credential sentence could be split for readability.

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 and no parameters, the description carries the return-value burden and does so by listing the six fields delivered. Auth requirements and the non-return of the secret are covered; what is missing is shape detail (array vs object) and pagination/ordering, which slightly limits completeness.

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 the baseline of 4 applies. Nothing in the description misleads about inputs; the mention of 'this key' correctly signals that the scope comes from the auth credential rather than a parameter.

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?

Uses a specific verb ('List') on a specific resource ('wallet alert subscriptions') with an explicit scope ('of this key'), and enumerates the returned fields. Sibling tools trnch_alerts_subscribe/unsubscribe are implicitly distinguished by the read-only 'List' verb, though no sibling is named directly.

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 never states when to call this versus alternatives, nor any precondition beyond authentication. An agent must infer that this is the inspection counterpart to subscribe/unsubscribe; there is no explicit routing guidance or exclusion.

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