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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered. The description adds genuinely useful behavior beyond that: results are limited to changes (not current state), include both raised and lowered, and are sorted newest first. It omits pagination/limit behavior and what a change record contains.

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?

One sentence, front-loaded with the resource and no filler. It is efficient, though the brevity contributes to the missing usage and parameter detail rather than reflecting deliberate trimming.

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 simple optional-parameter read tool with annotations covering safety and no output schema, the core intent is conveyed. Gaps remain around the limit default, result shape, and how this differs from `alert_level`/`list_alert_levels`, which an agent would need to choose correctly.

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% for the single `limit` parameter, and the description never mentions it, so an agent gets no explanation of the cap, default of 20, or max of 100 beyond raw schema constraints. The description does not compensate for the coverage gap.

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 states a concrete resource (alert level changes) with a scope qualifier (most recent, raised or lowered) and an ordering guarantee (newest first). An agent knows exactly what this returns. However, it never distinguishes itself from the sibling tools `alert_level` or `list_alert_levels`, so sibling selection must be inferred.

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?

There is no explicit when-to-use or when-not-to-use guidance, and the two sibling tools are not mentioned at all. The only signal is the implicit 'changes over time' framing, which is not enough to route an agent between this and `list_alert_levels`.

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