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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so safety is covered. The description adds real value by scoping the payload to intake logs, planned entries and plan activations, but says nothing about timezone handling, whether activations are historical snapshots, or behavior for a date with no data.

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?

One compact sentence with the resource and its contents front-loaded and zero filler. It is arguably too terse for the responsibilities it carries, but nothing in it is padding.

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?

With no output schema, the description must convey return content — and it does list the three sections. However it leaves the date semantics and the boundary with today-intake/nutrient-totals tools unspecified, which are the two things an agent most needs here.

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 coverage is 0% and the description contributes nothing about the single required parameter — no mention of the YYYY-MM-DD format enforced by the pattern, no note on whether today can be omitted or whether the date is interpreted in local time.

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?

States a specific verb+resource ('Journal detail for one day') and enumerates the three content categories returned. An agent can distinguish it from stackwell_get_today_intake or stackwell_get_active_plan by the combined scope, but the description never names those siblings to make the contrast explicit.

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 on when to use this versus stackwell_get_today_intake (single-day intake), stackwell_get_nutrient_totals, or joiva_get_day. The date parameter implies a historical lookup but nothing states when-not to use it or what an empty day yields.

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