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

No annotations are provided, so the description carries the full burden. It discloses several behaviors: live status, round-based vs continuous-specific fields, expected next step, official source, and the 'open' status for continuous-intake visas. It does not mention error/edge-case behavior, but given its read-only nature, this is a solid disclosure.

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 sentences, with the main purpose front-loaded and usage guidance immediately following; the final clause about continuous-intake visas adds needed behavioral detail without excess.

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 status tool with no output schema, the description covers the core return fields (open status, cutoff, expectations, source) and usage timing. It lacks guidance on where visa_id comes from and how to handle unknown IDs, so it is not fully complete.

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 provides only a required visa_id string with no description (0% schema coverage), and the description does not explain the format, source, or example values for visa_id. It only implies it identifies a 'single visa pathway', leaving the agent to guess how to obtain/format the ID; sibling tools are not referenced for ID resolution.

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 opens with 'Check the live intake status of a single visa pathway', naming a specific verb and resource, and enumerates concrete outputs (open/closed, last selection round, cutoff, expected next, official source). The title and mention of 'single pathway' distinguish it from siblings like transita_compare_visas or transita_visa_details.

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 explicitly instructs 'Call this before recommending a pathway' to avoid directing users to closed programmes, giving a clear when-to-use rule. It implies round-based vs continuous-intake contexts but does not explicitly name alternative tools or list when-not-to-use conditions.

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