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

With no annotations provided, the description carries the full behavioral burden and explicitly discloses that the operation is read-only and sends nothing. It also explains plan-dependent behavior by noting checkpoints saved (Pro) or that would have been saved (free). It does not mention permissions or rate limits, but for a read-only report that is a minor gap.

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 tightly packed clauses with no wasted words: first the purpose and scope, then the safety property. The most important information is front-loaded, and the colon list efficiently enumerates report contents.

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 zero-parameter, no-output-schema, read-only tool with no annotations, the description covers purpose, time scope, report contents, and side-effect profile well enough for correct invocation. The only meaningful omission is when to choose this tool over the many sibling weekly_report and memory tools.

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 input schema has zero parameters, so parameter semantics are not applicable. Per the rubric, 0 params gives a baseline of 4; the description correctly adds no irrelevant parameter detail.

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 gives a specific verb ('Draft'), resource ('plain-English report'), and scope ('last 7 days'), plus the exact contents: runs and checkpoints saved or that would have been saved. It clearly distinguishes the tool from checkpoint-management siblings like memory_list_checkpoints and memory_save_checkpoint, but it does not explicitly name an alternative or contrast itself with the other weekly_report tools.

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 says what the tool produces but never states when to use it versus alternatives, despite many sibling tools including approve_weekly_report, budget_weekly_report, and loop_weekly_report. 'Read-only; sends nothing' describes behavior, not selection criteria, so there is no real usage guidance.

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