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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the description doesn't need to restate safety. It adds only the authorization qualifier and does not disclose pagination behavior, response contents, or ordering. Minimal added value beyond annotations.

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 one short sentence with no filler, and the action is front-loaded. It is concise, though it is sparse enough that it adds little beyond the title. Conciseness itself is still good.

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?

As a list tool with no output schema and 0% parameter coverage, the description should explain pagination, authorization requirements, and what is returned. It only gives a one-line purpose, leaving the agent to guess how to use limit and starting_after and what the response shape is. This is incomplete for reliable 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?

The schema has 4 parameters (department_id, limit, starting_after, request_id) with 0% schema description coverage, and the description explains none of them. It doesn't say what limit or starting_after control or what request_id is for. The description completely fails to compensate for the schema's lack of parameter documentation.

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 ('List') and resource ('Department members'), and the qualifier 'for an authorized Department' narrows scope. It reads distinctly from siblings like yardstick_departments_members_add or yardstick_departments_list, though it doesn't explicitly name an alternative. This is clear but not actively differentiating.

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?

No explicit when-to-use or when-not-to-use guidance is given. The phrase 'authorized Department' implies a prerequisite, but there is no discussion of alternatives or conditions for choosing this list tool over other department member tools. Usage is only implicit.

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