get_timeline_item_properties

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

With no annotations, the description must disclose behavioral traits but only states 'Get all properties', implying a read operation. It does not explicitly state that the tool is non-destructive or that no modifications occur. Given the absence of annotations, this is insufficient.

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 concise: a single sentence for the purpose followed by a clean list of parameters. It is well-structured and front-loaded, with no wasted words.

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?

Given the existence of an output schema, the description need not detail return values. The parameter descriptions are complete, but it could mention that the output schema contains the properties. Overall, it is mostly complete for a read 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?

Schema description coverage is 0%, so the description compensates by explaining each parameter: track_type (video/audio/subtitle), track_index (1-based), item_index (0-based), and their defaults. This adds meaning beyond the schema which only provides titles and defaults.

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 'Get all properties of a specific timeline item', which clearly identifies the action (get) and resource (properties of a specific timeline item). It effectively distinguishes from sibling tools like 'get_timeline_items' (which gets items) and 'set_timeline_item_property' (which sets properties).

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?

No guidance is provided on when to use this tool versus alternatives such as 'get_timeline_items' or 'set_timeline_item_property'. The description lacks explicit context for when to use or not use this tool.

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