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

Annotations already declare readOnlyHint=false, idempotentHint=false, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description usefully adds that only one *short* note is stored and that persistence is scoped to future SuppCo conversations, but it does not say what happens on repeated calls, whether notes can be replaced or deleted, or if any account permission is 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?

Two short sentences with no waste, and the when-to-use trigger is front-loaded before the effect. Nothing could be removed without losing information.

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 write tool with full annotation coverage and no output schema, the description supplies the trigger, the effect, and the persistence scope, which is close to everything an agent needs. Only the relationship to the profile-update sibling is left unaddressed.

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?

With a single parameter at 100% schema description coverage, the schema already documents `memory` as 'The note to remember', establishing the 3 baseline. The description's 'one short note' adds a minor sizing/quantity hint for that parameter but no format or content guidance beyond it.

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 — saving a short note about the user to their SuppCo account — so the effect is unambiguous. It does not distinguish itself from the sibling suppco_update_my_profile, which is also a write to the user's account, so an agent can't fully tell the two apart from the description 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?

Gives a clear trigger condition: use only when the user explicitly asks SuppCo to remember a preference or fact. That is stronger than implied usage, but it names no alternative (e.g., update_my_profile for structured profile data) and states no when-not to use it.

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