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

The annotations already establish that this is a non-read-only, non-idempotent, non-destructive write with open-world effects. The description adds useful context beyond that: the new client is visible company-wide, is used for billing, and returns its id. It does not cover permissions or error behavior, but the annotation coverage lowers that burden.

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 front-loaded with "WRITE" and packs purpose, visibility, duplicate guidance, return value, and endpoint into three tight sentences. There is no redundant or filler language.

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 write tool with rich annotations and no output schema, the description provides what an agent needs: what it creates, what it returns, the duplicate risk, and the endpoint. Nothing essential is missing for correct invocation.

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% and the sole parameter business_name is already documented in the schema. The description confirms that business_name is the input, but adds no format or validation detail beyond what the schema provides, 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 verb and resource: "creates a new client (customer) in Bilflo." It also identifies the required business name and return value (id), so an agent can distinguish it from sibling tools such as bilflo_get_client, bilflo_list_clients, and bilflo_update_client.

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?

It gives a clear precondition: check bilflo_list_clients first to avoid creating a duplicate. The usage context is strong, though it does not explicitly say to use bilflo_update_client for existing clients instead of creating a new one.

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