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

Annotations already establish read-only, idempotent, non-destructive, closed-world behavior, so the bar is lower. The description adds real value beyond them: it discloses the return content (matching presumptive conditions), the second output (VA Form 20-0995 supplemental claim filing guidance), and the caveat that a current diagnosis and qualifying service are still required.

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 sentences, front-loaded with the core action and followed by the eligibility caveat and the secondary output. Nothing is redundant, though the form-guidance sentence is a slight add-on that could be trimmed without losing the core.

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 responsibly summarizes what is returned (matching conditions) and adds the extra form-guidance output. The remaining gap is minimal: it doesn't note how matches are ranked or what happens when symptoms match nothing.

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% and all three parameters are documented in the schema, including the enum and the 'any' semantics. The description restates era and deployment location but adds no syntax or matching behavior for the free-text symptoms parameter, 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 (match) and resource (PACT Act 2022 presumptive conditions) plus the two inputs it matches on. An agent can distinguish this from sibling tools like lookup_va_form, check_eligibility, or get_disability_rates without opening schemas.

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 frames the scenario (a veteran's era plus deployment location) and explains the presumptive-condition premise, which implies when it applies. However, it never names an alternative tool or states when NOT to use it, e.g. versus check_eligibility or lookup_va_form, so routing guidance remains implicit.

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