get_watchnow_sources_by_country_code

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the safety profile is covered. The description adds no behavioral context beyond the endpoint template—no mention of country code format, response behavior, pagination, or side effects. It 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 short and front-loaded with the main purpose, and the endpoint line provides concrete routing context. The Args section is somewhat redundant with the schema, but overall there is no significant waste.

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 read-only tool with an output schema and strong annotations, the description is nearly sufficient. The main gaps are the missing country code format/example and the lack of guidance distinguishing it from similar sibling tools.

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%, so the description needed to explain country_code. It only restates that it is a path parameter, which is already visible in the endpoint template, and gives no format, example values, or accepted country-code standard.

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 states a specific verb ('Get') and resource ('watch now sources') with the scope 'by country,' and includes the exact endpoint. It is not a tautology. However, it does not explicitly differentiate from sibling endpoints such as list_watchnow_sources or get_movies_by_id_watchnow_by_country, so it earns 4 rather than 5.

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?

There is no statement of when to use this tool versus list_watchnow_sources or the per-title watchnow-by-country endpoints. The sibling list contains many overlapping watchnow tools, and the description provides no selection criteria, exclusions, or alternatives.

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