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

Goes well past the annotations (readOnly/openWorld/idempotent) by disclosing the core epistemic caveat: a clean result means 'nothing found,' not 'school is open,' because no structured closure feed exists for this area. That is exactly the kind of failure-mode disclosure that prevents an agent from misreporting an all-clear.

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?

Three sentences, front-loaded with the purpose, then the most important warning in caps, then the fallback instruction. No filler and the highest-risk caveat appears early.

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 zero-parameter, no-output-schema tool, the description covers what it does, what a result does and does not mean, and where authoritative truth lives (the district link). Nothing an agent needs to call or interpret it is missing.

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?

Zero parameters, so there is nothing for the description to disambiguate; the baseline of 4 applies. The description correctly spends no words on parameter semantics and instead covers result interpretation.

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 (checks) and resource (Sedona-area school closure/delay/early-dismissal announcements), which is unambiguous. It doesn't name a sibling tool to differentiate from, even though get_emergency_alerts, get_nws_alerts, and get_local_news_headlines all cover overlapping territory.

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?

Usage is implied by the domain (checking school status in Sedona), and 'always defer to the district link returned' gives a clear post-call instruction. However, it never says when to prefer this over get_emergency_alerts or get_local_news_headlines, so the agent must infer routing.

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