summarize_shifts

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

No annotations are provided, so the description must carry the behavioral burden. It only mentions 'summarize' but doesn't disclose what the output contains (e.g., totals, averages, grouping), whether it's read-only, or any side effects. For a tool with 3 parameters and output schema, this is insufficient.

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 description is a single, efficient sentence that directly states the tool's function. It is front-loaded and contains no unnecessary words, earning high marks for conciseness.

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?

Given the absence of annotations, 0% schema coverage, and 3 parameters (2 required), the description is too minimal. While an output schema exists, the description does not clarify the aggregation level or how the calendar parameter affects results, leaving significant gaps for an AI agent.

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 0% description coverage for parameters. The description explains 'ISO date/datetime range' for start and end, adding some context, but the optional 'calendar' parameter is not mentioned at all, leaving its purpose unclear.

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 clearly states the tool summarizes shift count and hours over an ISO date/datetime range, specifying the verb, resource, and scope. However, it doesn't differentiate from the sibling tool 'summarize_by_period' which likely has similar functionality.

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 is provided on when to use this tool versus alternatives like 'summarize_by_period' or 'shifts_on_date'. The description lacks any context of when to not use it or what distinguishes it.

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