get_stats

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

Annotations already declare readOnlyHint=true (and openWorldHint=true), so the safety profile is covered. The description adds nothing beyond that — it does not say what data the summary contains, whether it aggregates a full day, or any latency/permission characteristics.

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 one sentence is duplicated verbatim ('Alias of getUserSummary. Alias of `getUserSummary`.'), which is pure redundancy rather than concision. It is short, but the space is spent repeating itself instead of adding the routing information a reader needs.

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 read-only date-scoped stats tool sitting among a dozen near-identical stats/summary siblings, the description should at minimum clarify what it returns versus get_user_summary or get_daily_stats. With no output schema and only an alias pointer, the agent cannot tell what distinguishes this call.

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 100% and the single `cdate` parameter (YYYY-MM-DD UTC) is fully documented in the schema. The description adds no parameter meaning of its own, so the baseline 3 applies.

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 only asserts that the tool is an alias of `getUserSummary`, which does not state a verb+resource of its own and forces the agent to look up another tool's semantics. It also references a camelCase name that does not exactly match the sibling `get_user_summary`, so the mapping requires inference. This is close to restating the name rather than explaining purpose.

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?

There is no guidance on when to call get_stats instead of the many overlapping siblings (`get_user_summary`, `get_daily_stats`, `get_stats_and_body`, `get_user_profile`). The alias statement weakly implies interchangeability but never says which form is preferred or whether one is deprecated.

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