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

Annotations already declare this is a non-destructive, idempotent, closed-world write. The description adds useful behavior—claim records intent and does not grant membership—but does not explain what account is returned, auth requirements, or idempotent semantics.

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 short sentences, with the core action and scope front-loaded. Every sentence adds distinct information about the kind values.

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 two-parameter setup tool with rich safety annotations, the description covers invocation sufficiently. Minor gaps remain around return values and explicit disambiguation from start_business_claim.

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?

With 0% schema description coverage, the description carries the parameter burden and does well: it explains the kind enum and ties display_name to kind=shopper. It leaves minor gaps, such as whether display_name is ignored for claim and the 80-character limit.

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?

Names a specific verb ('Create') and resource ('this sign-in's account') and states the scope 'before any business exists.' It also distinguishes the two account kinds, though it does not explicitly name the start_business_claim sibling.

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?

Establishes clear context for when to call: before any business exists. The kind-specific sentences guide the shopper/claim choice, but no explicit when-not or alternative tool is named.

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