send_bulletin_mail_notification

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

With no annotations, the description carries the full burden and does well: it flags the operation as high-risk, requires X-Consent-Token, and warns that the recipient set includes instructors and TAs, not just students — a genuine side-effect disclosure an agent would otherwise miss. It still omits whether the send is immediate or queued, whether it is reversible, and any volume/rate caveats.

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: purpose first, then the high-risk/consent warning in a bracketed callout. Nothing is redundant and the critical constraint is front-loaded where an agent will read it.

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 2-parameter mutation with no annotations and no output schema, the description covers what the tool does, the scope of its side effect, and the gating prerequisite. The remaining gap is procedural — it never says where to obtain the consent token — which matters for a tool that cannot be called without one.

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%, so both bulletinId and consentToken are already documented in-schema, establishing a baseline of 3. The description adds only the framing that the bulletin's content is what gets mailed; it provides no format, ID-source, or token-lifetime detail 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?

States a specific verb (寄送 email) and resource (指定公告內容) plus an explicit recipient scope (全體修課生成員，包含教師與助教). This distinguishes it from list_bulletins/create_bulletin/copy_bulletin, which manage bulletins but do not dispatch email.

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?

The description makes clear the context of use (broadcast a bulletin to all course members by email) and states a hard prerequisite: a UI consent token must be obtained first. It does not name the sibling that issues that token (request_ui_consent / request_action_consent) nor give any 'when not to use' condition, so it stops short of full routing guidance.

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