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

Annotations already declare readOnly=true, destructive=false, and closed-world, so safety is covered. The description adds real behavioral context beyond that: default unread filtering, page-size default of 50 with a max of 100, an upstream cap of 50 for unread, and newest-first ordering for history results.

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 scope rule is front-loaded in the first sentence, followed by a compact per-parameter list. It is appropriately sized with no filler, though the trailing cap note is vague enough to read as noise rather than a precise constraint.

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 three-parameter read tool with a published output schema and annotations covering the safety profile, the description supplies everything an agent needs to invoke it correctly: scope defaults, pagination behavior, and ordering. Only the sibling routing question (vs. list_alerts) is left unaddressed.

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 0%, so the description carries the full burden and largely succeeds: it documents all three parameters with defaults, the page-size maximum, and the semantics of history ('return fired alerts including ones already read, newest first'). The 'Unread upstream cap is 50' note is terse and slightly ambiguous, but no parameter is left undocumented.

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 gives a specific verb and resource ('Get alert notifications') and states the default scope (unread only) versus the broadened scope (history). It does not, however, distinguish itself from the sibling 'list_alerts', which an agent could plausibly confuse with this notification-fetching tool.

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 rule 'Unread only, unless history is set' gives the agent a clear condition for changing scope, but there is no explicit when-to-use guidance and no named alternative among the siblings (e.g., list_alerts for alert definitions). Usage is implied rather than stated.

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