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

Annotations already declare read-only, idempotent, non-destructive and open-world, so the safety profile is covered. The description adds real value beyond them: the result is sorted newest-first and each record carries plan, sponsor, case type, close date/reason and penalty bucket. Pagination/truncation behavior is unstated.

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?

Three tight sentences: scope and ordering first, then returned fields, then the use case. Nothing is redundant, though the quoted query in the final sentence is the least essential element.

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 compensates by enumerating the returned fields, and it covers defaults and filtering. The main residual gap is how this differs from ebsa_search for an agent choosing among four EBSA 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?

Schema description coverage is 100%, so limit, state, case_type and the API key are already fully documented. The description only echoes the case-type/state restriction, adding no format or semantics beyond what the schema provides, 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?

States a specific verb and resource ('most recent closed EBSA civil-penalty enforcement actions'), plus ordering (newest first) and optional narrowing. It does not distinguish itself from siblings like ebsa_search, ebsa_coverage or ebsa_sponsor, so an agent must infer the boundary.

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 closing sentence 'Use for "what EBSA enforcement actions closed recently"' gives an explicit use context tied to a query shape. It stops short of naming alternatives or stating when a broader search tool is the better pick.

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