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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety bar is low. The description adds real behavioral value by disclosing the eligibility rule (presumptive = no medical proof) and that the tool also emits VA Form 20-0995 supplemental-claim filing guidance as a side output.

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 compact sentences that front-load the match operation and then the qualifying rule and output. No filler, though the second and third sentences could be tightened slightly.

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 does the job of stating what comes back (all qualifying presumptive conditions plus 20-0995 filing guidance). It is nearly complete for a 3-param read-only matcher; it could say more about zero-match behavior or guidance format.

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 the schema already documents all three parameters, making 3 the baseline. The description reinforces era/location matching but omits the free-text symptoms parameter entirely, adding no meaning beyond the schema.

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?

Names a specific verb (match) and resource (PACT Act 2022 presumptive conditions) plus the exact inputs used (service era and deployment location). It is clearly distinguishable from most siblings in substance, but never explicitly contrasts itself with adjacent tools like check_eligibility or calculate_va_benefits.

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?

It gives a useful qualifying condition ("no medical proof needed for presumptives — service + location is enough"), which tells the agent this tool is not for medical-nexus claims. However, it never states when to prefer this over check_eligibility/calculate_va_benefits, nor what to do when nothing matches.

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