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

No annotations are provided, so the description carries the burden. It discloses the data scope (cinemas of this operator) and notes that opening hours are included 'cuando consta' (when available), which is a useful behavioral caveat. It does not mention whether the list is paginated, sorted, or if it requires any auth, but for a simple list tool this is acceptable.

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?

A single, compact sentence that front-loads the resource and lists the key fields. Every word earns its place; no filler or repetition.

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 zero-parameter list tool with no output schema, the description is reasonably complete: it names the resource, the fields, and the caveat about opening hours. It could mention whether the list is ordered or if there are any limits, but those are minor gaps for this simple tool.

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 tool has zero parameters, so the schema provides no parameter documentation. The description compensates by explaining what the returned data contains, including the identifier's purpose ('para filtrar'). With 0 params, baseline is 4, and the description meets it.

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 resource ('cines de este operador') and lists the fields returned: nombre, identificador para filtrar, dirección, zona horaria y horario de apertura. It is clear what the tool does, though it does not explicitly differentiate from siblings like cartelera or buscar_pelicula.

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 this is a reference/list tool for cinemas, useful for obtaining an identifier to filter elsewhere. It does not explicitly state when to use it over siblings or mention alternatives, but the context of listing cinemas with an 'identificador para filtrar' gives a reasonable usage hint.

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