Create random alias

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

Annotations already declare readOnlyHint=false, idempotentHint=false and destructiveHint=false, so the mutation/no-retry profile is covered. The description adds that the address is system-generated and that note/hostname are optional attachments, but says nothing about quota consumption, account requirements or what object is returned.

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?

Three compact sentences that front-load the core action before detailing mode and optional fields. Every clause carries information; only the mode explanation slightly duplicates the schema.

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 3-optional-parameter creation tool whose annotations carry the safety profile and whose schema is fully described, the description covers action, address generation variants and optional attachments. The only minor gap is not indicating what the created alias response contains, which is defensible given no output schema is declared.

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 already 100%, so mode, note and hostname are fully documented structurally. The description restates mode semantics and the 'omit for account default' behavior without adding syntax or format detail beyond the schema — baseline 3.

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?

States a specific verb and resource ('Create a new random SimpleLogin alias with a system-generated address'), and the phrase 'random'/'system-generated' implicitly separates it from alias_create_custom. It never names that sibling explicitly, so the differentiation requires a small inference.

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?

Explains the mode options and that omitting mode falls back to the account default, which is useful selection guidance at the parameter level. However, it gives no explicit when-to-use vs. alias_create_custom or any prerequisite/auth context, leaving the alternative routing implied.

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