Air daily summary

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, covering the safety profile. The description adds valuable behavioral context beyond annotations by disclosing the version limitation: v0.1 returns only the current reading framed as a daily snapshot, with richer aggregation deferred to v0.2. This is exactly the kind of caveat an agent needs to set expectations correctly.

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 with zero filler. The core purpose is front-loaded in the first sentence, and the version caveat is appended in the second. Every word earns its place.

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 no output schema, the description carries the burden of explaining return values, yet it never states what a synthesized daily snapshot contains (AQI metrics, pollutant breakdown, units, etc.). The tool is simple and read-only with strong annotations, so the gaps are not severe, but the relationship to air_current_reading and the actual snapshot contents remain unexplained.

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 67%, covering date and privacy_mode with meaningful descriptions, but locationId is completely undocumented in both schema and description. The description adds no parameter information at all, leaving the agent to guess what identifier locationId expects and what 'synthesized daily snapshot' means in terms of privacy_mode behavior.

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 opens with a specific verb and resource: 'Returns a synthesized daily snapshot for a location,' which clearly states the tool's purpose. However, the honest caveat that 'v0.1 returns the current reading framed as a daily snapshot' blurs the boundary with the closely named sibling air_current_reading, so differentiation is imperfect.

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 is given on when to use this tool versus alternatives. The most similar sibling, air_current_reading, is never mentioned, which is a significant omission given the description admits v0.1 effectively returns the current reading. The 'daily snapshot' framing implies a use case but never states when to prefer this tool over air_trend or air_current_reading.

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