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

The annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so safety behavior is fully covered by structured data. The description usefully adds that the return includes both a checklist and a window-position assessment, but says nothing about formatting or the edge behavior implied by the negative-day range.

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?

A single front-loaded sentence that names the return value and the key domain constraint with no filler.

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 one-parameter, read-only, closed-world tool with no output schema, the description conveys what comes back and the window framing. Only a brief note on output shape or what happens outside the window is missing.

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 100% so the schema already documents daysUntilSeparation. The description goes beyond it by supplying the domain-relevant 180-to-90-day window threshold, which gives the numeric input concrete meaning the schema alone does not.

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 ('Return') and a concrete resource (the BDD prep checklist plus the member's position in the 180-90 day window). It is clearly distinguishable from ask_va_benefits_question and estimate_combined_rating, though it never names or contrasts them.

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?

Usage is only implied by the topic (BDD eligibility/prep). There is no statement of when to call this versus the sibling tools and no preconditions or exclusions, so the agent must infer the trigger.

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