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

With no annotations provided, the description carries the full burden. It discloses that only provided fields are changed, which is valuable, but it does not mention permissions, errors, return value, or any side effects. This is minimal behavioral disclosure.

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?

The description is two short sentences, both useful. It is appropriately concise, front-loaded with the core purpose, and contains no redundant or filler content.

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?

The tool has 8 parameters, no output schema, and no annotations, yet the description provides very little context about expected behavior beyond partial update. It does not explain what happens on success, whether validation occurs, or how to interpret any response.

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 only 13% (only ruleId is described). The description does not compensate for the missing parameter details. 'Only provided fields are changed' implies that optional fields can be sent, but it adds no specific meaning to parameters like eventTypes, severities, or quietHours.

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 clearly states the action ('Update') and the resource ('notification rule'), which distinguishes it from sibling tools like create_notification_rule and delete_notification_rule. The added phrase 'Only provided fields are changed' further clarifies the partial-update semantics.

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 explicit guidance is given about when to use this tool versus alternatives such as create_notification_rule or delete_notification_rule. The verb 'Update' implies its use, but there is no mention of prerequisites or scenarios.

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