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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It does this well by revealing the non-obvious side effect: reading the list may trigger the daily rollover just like opening the app. It could add more detail about what the rollover changes or the exact response shape, but the most important behavioral trait is covered.

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 compact sentences with no filler. The first sentence front-loads the verb and resource and packs in the list contents and default limit; the second earns its place by disclosing the rollover side effect.

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 parameterless tool with no output schema, the description is complete: it explains the list scope, default and configurable max, item fields, and a caveat about triggering rollover. An agent has enough context to call the tool and interpret the result.

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?

There are zero parameters and schema description coverage is 100%, so the baseline is 4. The description adds useful value by enumerating what the returned items contain, even though no parameter semantics are needed.

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 states a specific action ('View') and resource ('today's focus list'), and goes on to specify what the list contains (completion state, progress, criteria). It is clearly distinct from add_todo and list_reserve, which are about adding and reserving rather than viewing the day's items.

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 implies when to use the tool: when the agent needs today's focus list. It does not explicitly mention alternatives or exclusion conditions, such as when list_reserve would be more appropriate, so it stays at minimum viable rather than providing strong routing guidance.

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