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

With no annotations, the description carries the behavioral burden well: it explains that the person sees only that queue's threads and that privileged ranks are refused. It does not cover caller permissions, idempotency, or error responses, but the key access semantics are disclosed.

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 core action is front-loaded, and the three sentences each add useful context about access scope and the refusal case. There is no redundant or filler content.

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 two-parameter mutation tool with no output schema or annotations, the description covers the important behavioral effects and a notable edge case. It could say more about return behavior or what happens when the person is already an operator, but it is largely complete.

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 description coverage is 100%, so both parameters are already documented thoroughly, including the queue-vs-mailbox distinction and how to find queue addresses. The description adds account-level context but does not add parameter-specific details 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 states a specific action and resource: naming a person on a helpdesk queue so they can work its threads. It also explains the access effect, making the tool's purpose clear without needing to inspect the schema.

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 clear situational context for using the tool: splitting a shared queue between colleagues by department. It does not explicitly name alternatives such as add_mailbox_holder or remove_queue_operator, though the schema covers the mailbox distinction.

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