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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds the useful detail that results include both work sites and billing addresses, but says nothing about pagination, result ordering, or what happens for a client with no addresses.

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 short sentences with the resource described first and the endpoint second, so nothing is buried. The raw endpoint path is of marginal value to an agent but is at least confined to one short clause.

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 read-only list tool with a fully documented single parameter, full annotation coverage, and no output schema, the description gives enough to call it correctly and knows what entities come back. Return shape and pagination details are the only notable omissions, and their absence is minor here.

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 single client_id parameter is documented in the schema, so the baseline of 3 applies. The description reinforces that the id refers to a single client and echoes it via the endpoint path, but adds no format or validity constraints 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 names the specific resource (client addresses) and narrows the scope to one client, distinguishing it from siblings like bilflo_list_client_contacts and bilflo_list_client_agreements. It is stated as a noun phrase rather than a verb, but the tool name and the enumerated address types (work sites and billing addresses) make the intent unambiguous.

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?

There is no explicit guidance on when to use this tool versus alternatives such as bilflo_get_client, and no stated prerequisites beyond the implied single-client scope. Usage must be inferred entirely from the tool name and the resource description.

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