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

With no annotations, the description carries the full burden. It discloses that the operation creates a tenant (a side effect), requires no authentication, and returns a bearer key and namespace. It does not cover failure modes or idempotency, but it covers the essential behavior for a simple signup tool.

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 two short sentences with no filler. It front-loads the core action and output, then adds the critical authentication context. Every word 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?

For a simple one-parameter, unauthenticated tool, the description is complete: it explains what is created, what is returned, and the authentication requirement. No output schema exists, so the description's mention of the bearer key and namespace fills that gap.

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 already documents the only parameter, 'name', as the display name, with 100% coverage. The description adds no additional parameter-level meaning, so the baseline score of 3 is appropriate.

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 states a specific action ('Create a tenant') and the key outputs (bearer key and namespace). It clearly differentiates this tool from sibling billing, host, and registry tools by identifying it as the tenant-creation entry point.

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 provides clear usage context by noting the endpoint is 'Unauthenticated,' implying this is the first step before authentication and before using authenticated sibling tools like host.whoami. It does not explicitly name alternatives or exclusions, but the scenario is reasonably clear.

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