create_r2_bucket

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

Adds crucial behavior beyond annotations: the confirm parameter acts as a safety gate, and without it the tool returns a non-executing preview with redacted secrets. Annotations only indicate readOnlyHint=false and destructiveHint=false.

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 sentences, each essential. No wasted words, front-loaded with purpose and key requirement.

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?

Covers the main behavior (create vs preview) and the confirm gate. Could mention success output or error handling, but given the simplicity and annotations, it's sufficient.

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 coverage is 100% with clear parameter descriptions. The description reinforces the confirm parameter's role but doesn't add substantial new info beyond 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 states the tool creates a new R2 bucket, distinguishing it from sibling tools like create_dns_record or create_zone.

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?

Explicitly explains the human-approval gate (confirm:true) and the preview behavior when not confirmed, guiding the agent on when to execute vs. preview.

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