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

Annotations already mark the tool as read-only. The description goes beyond this by explaining that free titles are YouTube releases played through the YouTube player and rentals require Chapa, plus the 48-hour rental window. This gives an agent useful context about watch access without contradicting the readOnlyHint.

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 two sentences with no filler. It front-loads the resource and output fields, then adds access behavior and search capability. The first sentence is somewhat dense but remains readable and appropriately sized.

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?

With no output schema, the description explicitly lists the returned fields (title in Amharic and English, year, genre, price, watch URL). It also covers the free vs rental access model. It could mention limit/pagination behavior, but for a simple list tool this is nearly 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?

Schema description coverage is 100%, with limit and query both described. The description's mention of 'optional search by title or genre' mirrors the query parameter, adding no new semantics. Baseline 3 is appropriate since the schema already documents the 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 states exactly what the tool does: it returns licensed Amharic films watchable online on BinaSmart Watch, including specific fields (title, year, genre, free/rental status, watch URL). The resource and scope are unambiguous, and the tool is clearly distinct from the ride, place, event, and hospital 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 context is clear: this tool is for discovering Amharic films on BinaSmart Watch, with optional filtering by title or genre. It does not explicitly name alternative tools or when not to use it, but no sibling offers film listing, so the intended usage is effectively communicated.

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