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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so safety is covered structurally. The description adds only that packs are "bounded" (scope limit) and includes source filing details, but says nothing about batch size limits (25 districts, 20 funds per schema), failure behavior for unknown districts, or what the deficit metric is computed against.

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 operation front-loaded, no filler or marketing language. The second sentence is arguably tangential to invoking the tool, but it is dense and earns partial credit as domain context.

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 9 parameters, only 1 required, two enums, and a sibling single-district variant, a two-sentence description is far too thin — batching semantics, defaults (Fund 01, estimated_actuals, summary), and the relationship to the singular tool are all absent. The output schema exists so return values need not be explained, but input behavior is not covered.

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 0% across 9 parameters, so the description carries the full burden and fails to do so. It explains nothing about basis (five filing stages), detail (summary vs full), fiscal_year_min/max, one_time_resource_codes, or include_balance_sheet_from_actuals — an agent must guess at the fiscal-impact of each. The only term defined (deficit spending) describes output, not an input.

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?

"Build bounded district packs with source filing details" names a verb (build) and a resource (district packs) but "bounded" and "pack" are internal jargon, and the description never distinguishes this batch tool from the sibling sacs_district_context_pack (singular). The second sentence defines a metric rather than the tool's purpose, so an agent must infer the batch-vs-single distinction from the name alone.

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?

There is no when-to-use guidance, no mention of when to pick this over sacs_district_context_pack or sacs_query_financial_summary, and no stated batching limits or prerequisites. The deficit-spending definition is a glossary note, not usage guidance.

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