b2_reserve_trial_create_account

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

The annotations already flag the operation as destructive and not read-only. The description adds a valuable behavioral caveat beyond those annotations: account creation has no provider-side recovery path if a file sink write fails. This helps the agent appreciate the irreversibility and failure implications.

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?

The description is compact and front-loaded: the first sentence states the purpose, the second adds a crucial caveat. Minor jargon such as 'file sink' slightly reduces clarity, but every sentence earns its place.

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?

Given a fully described schema, clear annotations, and a focused purpose statement, the description is largely complete for invocation. The failure-recovery caveat materially improves completeness for a destructive operation, though no output/return behavior is described.

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 100%, and every parameter already has a meaningful description, including the confirm flag's destructive-policy dependency. The tool description itself adds no parameter-specific guidance, so it neither duplicates nor needs to compensate for the schema.

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 clearly identifies the action ('Reserve'), the resource ('a B2 trial account'), and the channel ('through the Partner API'). This is distinct from the sibling create/update tools and leaves no ambiguity about what the tool does.

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 gives a clear condition of use ('Available only in explicit inline mode') and explains the reason behind it, which helps an agent decide *how* to call it. However, it does not name alternatives or explicitly state when not to use this tool versus another sibling.

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