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

No annotations are provided, so the description carries the full burden. It discloses key behavioral aspects: the rule triggers notifications based on events, severities, and channels, and supports quiet hours and per-target scoping. However, it does not mention side effects, permission requirements, or response behavior, leaving some gaps for a mutation tool.

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, front-loaded with the primary action and resource. Each sentence adds meaningful detail: the first defines the purpose, the second highlights key features. No fluff or redundancy.

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?

With 8 parameters and no output schema, the description covers the core functionality but omits possible validations or response details. However, the schema already documents parameters fully, and the description effectively captures the essential behavior, making it complete enough for an experienced user.

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 the baseline is 3. The description adds value by explaining the overall semantics: 'Supports quiet hours and per-target scoping' clarifies the purpose of quietHoursStart/End and targetId beyond their schema descriptions. This enriches the parameter understanding without being verbose.

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 verb and resource: 'Create a notification alert rule.' It then defines the specific purpose: 'Defines which events at which severity levels trigger notifications on which channels,' distinguishing it from sibling tools like create_automation_rule and create_muting_rule.

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?

The description provides clear context for when to use the tool: it creates notification alert rules with event/severity/channel mappings. While it does not explicitly mention alternatives or exclusions, the context is sufficient given the tool's name and sibling differentiation.

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