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

Annotations already declare readOnlyHint, idempotentHint, and closed-world behavior, so the safety profile is covered. The description adds real value beyond that by disclosing the sort order ('newest first') and the set of status values reported, but it says nothing about retention window, pagination beyond the limit field, or what happens when a monitor has never changed status.

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 the scope and finishes with the ordering guarantee; there is no filler and nothing an agent must read twice.

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 read-only two-parameter list tool with full schema coverage and complete annotations, this is nearly sufficient: scope, event types, and ordering are all present. The only real gap is pagination or truncation behavior when limit is hit, which the schema does not address either.

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%, so both id and limit are fully documented structurally, which sets the baseline at 3. The description adds a small but genuine clarification by confirming that id selects exactly one monitor's event stream, reinforcing the required parameter's meaning.

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 (list) and resource (status change events) scoped to a single monitor, and enumerates the event kinds (up, down, late, paused). It implicitly separates itself from the sibling list_events by the 'one monitor's' scoping, though it never names that sibling directly.

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 only implied: the phrase 'One monitor's' signals that this is the per-monitor drill-down rather than the global event feed, but no explicit when-to-use, when-not-to-use, or alternative is stated. An agent must infer the choice between list_monitor_events, list_events, and get_monitor.

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