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

readOnlyHint=true already tells the agent this is a safe read. The description usefully adds sort order ('newest first') and returned field ('status'), but says nothing about the cap on results, default page size, or pagination behavior despite a bounded limit parameter.

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 tight sentence with the ordering constraint and returned field front-loaded; nothing is wasted, though it is arguably too terse given gaps elsewhere.

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 read-only listing tool with annotations covering safety and no output schema, the description conveys the essential shape of the result (scans with status, newest first). It stops short of covering the limit parameter's behavior, which is the only real gap.

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?

The single parameter (limit) has 0% schema description coverage, so the description carries the full burden and it never mentions limit at all — no default, no reference to the max of 25. 'Most recent' hints at a bounded window but does not explain the parameter's semantics.

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 resource (the user's most recent scans), what each item includes (status), and the ordering (newest first). It is distinguishable from the singular get_scan_status and from list_monitors, though it never explicitly names a sibling or a verb.

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?

No when-to-use guidance, no mention of when to prefer get_scan_status or list_monitors instead, and no prerequisites such as an authenticated user context. The 'recent scans' scoping is the only implicit signal.

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