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

Annotations already declare this is a non-read-only, non-idempotent, non-destructive write. The description adds genuinely new behavioral context beyond that: the token is the only way back to the monitors unless they are tied to an e-mail, i.e. losing it is effectively irreversible. Auth requirements and repeat-invocation behavior are still unstated.

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, front-loaded with the action and then the critical caveat. The token prefix and 'monitors' are slightly cryptic, but no sentence is wasted.

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 tool whose annotations cover the safety profile and which has no output schema, the description covers purpose and the one high-stakes consequence of losing the token. It leaves the nature of a 'guest' and the 'monitors' undefined, but nothing needed to invoke it correctly 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 are no parameter semantics for the description to carry; the baseline for a parameterless tool is 4. Nothing in the description misleads about 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 names a specific verb and resource (creates a guest token) and even shows the token prefix ('hp_…'), so the agent knows exactly what is produced. It does not, however, distinguish this from sibling token/key tools such as ingest_key or ingest_key_rotate.

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?

There is no statement of when to create a guest versus using another tool, no prerequisites, and no mention of the related siblings. The only guidance given is a post-hoc warning to keep the token, which is retention advice rather than usage routing.

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