registry_create

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

No annotations are provided, so the description must carry the full burden of behavioral disclosure. It mentions the ctx parameter and return type but does not disclose side effects such as billing implications, irreversibility, or required permissions. For a mutation tool with zero annotation coverage, this is a significant gap.

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 well-structured with an Args section and a Returns section, front-loading the purpose. It is concise without unnecessary verbosity, though the inclusion of ctx (not in the schema) adds minor clutter.

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?

The description covers the essential parameters and return value, and an output schema exists so return details need not be exhaustive. However, it lacks guidance on retrieving valid plans or regions, and with no annotations, the behavioral context is incomplete. Overall adequate but not comprehensive.

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 schema has 0% description coverage, so the description compensates by explaining each parameter: name, plan, and region, with examples for plan and region. It adds meaning beyond the bare schema definitions, though it does not enumerate all valid plan options or provide full constraints.

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 'Create a new container registry subscription' with a specific verb and resource. It is unambiguous and distinct from sibling tools like registry_update or registry_delete, making the purpose immediately obvious.

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 does not explicitly mention when to use this tool versus alternatives such as registry_update or registry_list_plans. The verb 'Create' implies its use for new registries, but there is no explicit guidance or exclusion, leaving the agent to infer the context.

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