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

Annotations already establish that this is a read-only, idempotent, non-destructive, closed-world operation, so the description does not need to repeat that. It adds useful content categories (map link, best time to shoot, parking/safety/sound notes), but does not disclose missing-record behavior or field optionality.

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 a single front-loaded sentence with no wasted words. It immediately states the action, scope, and the kind of content returned.

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 simple single-record retrieval tool with rich annotations and 100% schema coverage, the description is nearly sufficient, and it usefully names several returned fields despite there being no output schema. It could be fuller about the complete shape of the returned record, but it covers the core use case.

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?

There is only one parameter, and the schema already documents it at 100% coverage with a clear Arabic description explaining that the ID comes from search results or a list. The main description does not add any further semantics for the 'id' parameter, so the schema is doing the work.

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 ('Fetch') and resource ('one filming location') and clarifies that it returns the full record rather than a list. This implicitly distinguishes it from list-filming-locations and update-filming-location, but it does not explicitly name those siblings.

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 phrase 'Fetch one filming location in full' implies this is the detail-retrieval tool to use when a single record is needed. However, it gives no explicit guidance on when to use list-filming-locations or search first, nor when to use update-filming-location instead.

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