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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds only the REST endpoint path and the date-range selection rule; it discloses nothing about pagination, rate limits, or the size/shape of the returned summaries. With annotations carrying the safety load, this is a minimum-viable 3.

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 short sentences with the core purpose front-loaded and the endpoint trailing. The endpoint path is marginally redundant for invocation, but nothing is bloated and no sentence is wasted.

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 summary tool with 100% schema coverage and no output schema, the definition supplies the date-range mechanics and identifies the member source via the schema. The remaining gap is explicit differentiation from the closely named sibling dashboard-summary tool.

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%, so all 8 parameters are already documented, and the description's 'give start and end, or a named range' merely echoes the schema's start/end/range fields. No additional syntax or constraint meaning is contributed beyond the schema.

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 verb and resource ('One dashboard member's coding activity as daily summaries') and scopes it with a date range. Writing 'One dashboard member's' distinguishes it in spirit from the dashboard-level wakatime_get_org_dashboard_summaries and the user-level wakatime_get_summaries, though it never names those siblings explicitly.

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 only conditional guidance ('give start and end, or a named range') concerns parameter selection, not tool selection. There is no statement of when to prefer this member-level tool over wakatime_get_org_dashboard_summaries or wakatime_get_summaries, and no prerequisites.

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