get_daily_insight

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 only states 'Retrieve a stored daily insight' without disclosing behavior on missing dates, idempotence, authentication needs, or side effects. This is insufficient for a tool that mutates no state but has potential error cases.

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 minimal yet effective: two lines, front-loaded with purpose, and no unnecessary information. Every sentence 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?

For a simple retrieval tool with one optional parameter and an output schema (not shown), the description is adequate but lacks information on what happens if no insight exists for the given date. Given low complexity, it barely meets the minimum viable standard.

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 description adds value by explaining the date parameter format ('YYYY-MM-DD') and default behavior ('Empty = today'). This compensates for the lack of schema-level descriptions (schema coverage 0%). The single parameter is well-documented.

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 ('Retrieve') and the resource ('stored daily insight'). It is specific and distinguishable from the sibling tool 'generate_daily_insight' which creates insights.

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 provided on when to use this tool versus alternatives, such as 'generate_daily_insight'. There is no mention of prerequisites, contexts where the tool is appropriate, or when to avoid it.

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