save_bookmark

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

No annotations are provided, so the description carries full burden. It describes the action of saving but does not disclose return value behavior, duplicate handling, permissions, or rate limits. The post-save workflow hints at return of an ID but not explicitly. Adequate but could be more transparent.

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 front-loaded with purpose and uses structured lists for examples and post-save workflow. It is clear but contains some extraneous detail about post-save actions that could be part of user guidance rather than tool description. Still, overall concise and well-organized.

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 (3 parameters, output schema exists), the description covers primary use well. It lacks discussion of error scenarios or duplicate handling, but for a straightforward 'save' tool it is largely 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 coverage is 100%, so parameters are fully documented in the schema. The description does not add new semantic meaning beyond the schema. Baseline 3 is appropriate.

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 clearly states the tool saves a bookmark to the user's bookmark collection, with specific verb+resource. Examples of user requests ('Save this URL', 'Bookmark this') further clarify purpose. It is well distinguished from siblings which focus on other operations like deletion or updates.

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 provides explicit when-to-use triggers with example phrases. It also suggests a post-save workflow. However, it does not mention when to avoid using this tool (e.g., for updating existing bookmarks) or explicitly differentiate from other sibling tools like update_bookmark.

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