list_safari_bookmarks

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

The description mentions it reads from a specific file path (~/Library/Safari/Bookmarks.plist), providing insight into its data source. It implies a read-only operation. However, it does not disclose permissions, error states, or performance characteristics. Since no annotations are provided, the description carries the burden but only partially fulfills it.

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 sentence that is cut off, making it incomplete. While brevity is good, the truncation means it fails to deliver a complete message, which harms usability.

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 tool's simplicity (no parameters, no output schema), the description is insufficiently complete. It lists what it returns (title+URL) but is cut off, leaving missing context about scope, limitations, or error handling. The truncated end suggests more information should be present.

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, and the schema coverage is 100%. The description adds no parameter-specific information because none exist. According to the rubric, with no parameters, baseline is 4. The description does not detract from this.

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 starts by stating it lists Safari bookmarks with title and URL, which is a specific verb and resource. However, it is cut off, leaving the purpose incomplete. It distinguishes from sibling tools like safari_navigate or safari_list_tabs by focusing on bookmarks, but the truncation reduces clarity.

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. There is no mention of contexts where bookmark listing is appropriate or when other tools might be better. The description lacks any usage direction.

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