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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds useful context by cataloguing the returned surface (history, per-user delivery, escalations) and citing the underlying GET endpoint, but says nothing about authorization requirements or rate limits. Given the annotation coverage, a 3 is appropriate.

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?

A single sentence that front-loads what is returned and tacks the endpoint onto the end; no filler, no restatement of the title. Every clause adds either content or routing information.

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?

There is no output schema, so the description must carry the return-shape burden, and it does so by enumerating the fields and nested structures (history, attachments, escalations with per-user delivery). Combined with 100% schema coverage on the lone input, an agent has what it needs; only cross-sibling disambiguation 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?

Schema coverage is 100% and the single alert_id parameter is fully documented in the schema, including where to obtain it (signl4_list_alerts or the id from signl4_raise_alert). The description adds no parameter-level information, so baseline 3 applies.

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 ('Full detail of one alert') and enumerates the fields returned (title, text, severity, category, status, history, parameters, attachments, escalations), which differentiates it from the narrower siblings signl4_get_alert_timeline and signl4_get_alert_report. It stops short of explicitly naming those siblings, so an agent must infer the boundary.

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 rather than stated: needing complete detail for a single alert is the obvious trigger, and the field enumeration suggests when this is preferable to the timeline/report variants. However, no when-not, no prerequisites, and no alternative is named despite three closely related alert-detail siblings in the list.

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