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

Annotations already declare readOnly=false, destructive=true, idempotent=true and openWorld=true, so the safety profile is covered. The description genuinely adds behavioral context: the acknowledgement is attributed to a specific user in history, and it halts escalation to further tiers. It does not explain what 'destructive' means here or note auth requirements, so it is not exhaustive.

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?

Two sentences, zero waste. The 'WRITE:' marker front-loads the mutation class, followed by effect and endpoint in descending order of usefulness.

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 write with no output schema and full annotation coverage, the description supplies effect, attribution, and endpoint. The only minor gap is the absence of any statement about the response or what happens on an already-acknowledged alert.

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 100%, so all three parameters (alert_id, user_id, comment) are already documented with sources for their values. The description adds no extra syntax or format detail beyond the schema's own fields, so the 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 (acknowledge) and resource (an alert/signl) plus the acting user, and immediately names the operational effect: 'Stops escalation to further tiers for that alert.' The scope is distinguishable from close_alert and annotate_alert, and the backing endpoint is given, so an agent can tell what this does without opening the schema.

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 by the semantics ('acknowledge' vs 'close'), but the description never states when to pick this over signl4_close_alert or signl4_annotate_alert, nor any prerequisite such as an active/open alert. The context is inferable but not spelled out.

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