Activate Mood

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

Annotations already state idempotentHint=true and destructiveHint=false, indicating safe repeated use. The description adds that it sets devices to saved states, which aligns with idempotency. However, it does not disclose any potential side effects (e.g., what happens if a device is offline?) or confirm that the operation is non-destructive.

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 sentences, front-loaded with the primary action, and contains no redundant or irrelevant information. Every word serves a purpose.

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?

Given the tool's simplicity, the description covers the main action. However, with no output schema, it does not explain the return value or error scenarios. Additional context on behavior when parameters are invalid or devices are missing would enhance completeness.

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 input schema covers 100% of parameters with descriptions, so the description does not need to add much. The description's mention of 'in a zone' and 'saved states' implicitly reinforces the purpose of zoneId and moodId, but it does not provide additional format or constraints beyond the schema.

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 'activate' and the resource 'mood' (scene) in a zone, and explains what it does (sets devices to saved states). It effectively distinguishes from sibling tools like list_moods, though it could be more explicit about how it differs from activating a flow.

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 guidance on when to use this tool versus alternatives (e.g., list_moods to see available moods, or set_device_capability for individual devices). The description does not mention prerequisites, such as the zone or mood needing to exist, nor does it provide exclusions.

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