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

The annotations only flag destructiveHint=true; the description adds genuinely new behavior: the two-phase confirm-gated flow (preview until confirm: true) and that a count is returned. That is high-value context for a destructive operation. It does not clarify whether "clear" deletes the records outright or marks them answered/dismissed, nor whether the action is reversible, which is the remaining gap.

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 short clauses with zero filler, front-loaded with the action and scope, then the return value, then the execution caveat. Every sentence carries information the agent needs.

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 destructive, zero-required-parameter tool with no output schema, the description covers scope, effect count, and the confirm gate, which is nearly everything needed to call it safely. The one missing piece is what "clear" actually does to the underlying records and whether it can be undone.

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 baseline is 3, but the description adds real semantics the schema lacks: omitting clientId means all clients rather than just one, and confirm governs preview-vs-execute. That mapping of parameter absence to scope is useful beyond the field descriptions.

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 ("clear every overdue check-in") and even defines the qualifier parenthetically as "never answered," which removes ambiguity. Scope ("for one client or for all") is spelled out. It stops short of explicitly contrasting itself with nearby siblings like remove_checkin or list_checkins, so an agent still has to infer the boundary.

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 clear context for when to use it: bulk clearing of unanswered check-ins, either scoped to one client or globally, and explains the confirm gate that governs execution. It does not name an alternative tool or state when NOT to use it (e.g., removing a single answered check-in), so it falls short of full routing guidance.

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