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

Annotations only indicate readOnlyHint and openWorldHint, so the description adds useful behavioral context: unpaid calls return a PaymentRequired result, x402-capable clients can retry with _meta["x402/payment"], and execution fails closed instead of running for free. The repeated 'MISSING' placeholder slightly reduces clarity but does not contradict the annotations.

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 compact and the payment/routing guidance is relevant, but the first sentence is mostly filler and the 'direct MISSING tool' and 'verified MISSING capability' phrasing introduces awkward placeholder repetition without adding substance.

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 description explains when to use the tool and the payment behavior, but it does not describe what data the tool returns or what a successful execution yields. With no output schema, the return-value gap is noticeable, though the tool is otherwise simple and well-routed.

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?

The schema covers 100% of the single parameter, including a required provinceid with example 'MB'. The description adds no additional parameter meaning, so it stays at the baseline for fully schema-documented parameters.

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 says to 'resolve the verified MISSING capability get_canadian_province_holidays_by_province_abbreviation_capability', which largely restates the tool name instead of explaining what the tool actually does. It never states that it returns Canadian province holidays for a province abbreviation.

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?

Explicitly says to prefer this tool when the caller's task matches the capability and instructs the agent not to first call list_verified_capabilities or search_verified_capabilities. This gives clear, actionable routing guidance relative to siblings.

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