justhandled_calendar_invite_timezone_preflight

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

No annotations are provided, so the description must fully disclose behavioral traits. It does disclose the cost ($0.05 USDC on Base mainnet) and the specific hazards checked, which adds useful context. However, it does not explicitly state whether the tool is read-only, what side effects (if any) occur, or what the response looks like. The word 'Check' implies analysis, but the monetary cost introduces operational ambiguity that is not resolved.

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?

The description is two sentences with no fluff. The first sentence states the purpose, and the second adds a critical operational cost detail. Every word earns its place, making it highly efficient.

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?

The tool has no output schema and no annotations, so the description must fill in gaps. It covers the purpose and cost, but it does not describe the return value (e.g., a report, list of hazards, boolean), nor does it clarify prerequisites or whether a blockchain transaction is required. For a paid tool with these gaps, the description is adequate but incomplete.

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 0%, but the description adds meaningful context by stating the events are 'normalized iCalendar events,' which clarifies the expected data structure beyond the raw schema's field list. It also names the hazard categories, indirectly linking them to the timestamp fields. This helps compensate for the low coverage, though it does not explain the exact format or semantics of dtstart/dtend as thoroughly as a full parameter doc would.

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?

The description clearly states the tool's purpose: 'Check normalized iCalendar events for floating time, boundary, DATE, sequence, and recurrence hazards.' This specifies a verb (check), a resource (normalized iCalendar events), and a detailed scope. It also distinguishes itself from sibling preflight tools, which cover other domains (e.g., gitignore, Shopify CSV, subtitle timelines).

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 implies usage when one has normalized iCalendar events to examine for timezone hazards, but it does not explicitly state when to use this tool versus alternatives. No exclusions or sibling comparisons are mentioned. There is clear context but no explicit guidance.

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