Clear hydration day

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

Annotations already indicate destructiveHint=true and idempotentHint=true. The description adds the important behavioral detail that the operation requires explicit_user_intent and only affects local hydration entries, not intake. This goes beyond the annotations. No contradiction found.

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 no wasted words. The first delivers the core action and condition, the second clarifies what it doesn't do and offers workflow alternatives. Perfectly sized and front-loaded.

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?

No output schema exists, so the description ideally would hint at the result (e.g., confirmation message). However, the tool is simple (3 parameters, no nested objects) and the description covers the key behavioral aspects and workflows. The missing return value info is a minor gap given the tool's straightforward nature.

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 33%: only explicit_user_intent has a description. The description mentions the intent requirement but does not explain the date parameter format or response_format options. Given low coverage, the description should provide more parameter context, but it only partially addresses one parameter.

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 tool deletes all local hydration entries for a date, with the critical condition 'after explicit user intent'. It also distinguishes from the sibling tool nourish_clear_day by noting it does not touch intake, providing specific guidance on when to use this tool versus alternatives.

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?

Explicitly states to use after explicit user intent, and provides clear alternatives: pairing with nourish_clear_day or using nourish_clear_day with include_hydration: true for both hydration and intake. This fully addresses when and when not to use the tool.

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