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

Annotations already declare a non-read-only, non-idempotent, non-destructive write, so the bar is lower; the description adds genuinely useful behavior by disclosing the two-step verification flow and that the domain is only added after verification. It omits whether repeated requests re-send emails and what permissions are required.

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 sentences, front-loaded with the action and followed by the consequence. No filler or redundancy.

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?

With no output schema, the description carries the burden of explaining the outcome, and it does so via the verification-email flow. It is nearly complete for a 2-parameter write tool whose safety profile is already covered by annotations, missing only permission prerequisites.

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 only 50% (organizationId is undocumented), and the description only reinforces the email parameter's meaning ('work email address at that domain'), which the schema already states. It does not compensate for the missing organizationId semantics.

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?

States a specific verb and resource ('Request adding an auto-join domain') and clarifies the mechanism (work email at that domain). It is readily distinguishable from the sibling remove_team_auto_join_domain, though it never names siblings explicitly.

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 describes how to invoke the tool (supply a work email at the target domain) and what follows, but gives no explicit when-to-use guidance, no prerequisites such as admin rights, and no comparison against alternatives like invite_team_member.

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