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

Annotations indicate this is a write (readOnly=false), non-idempotent, and world-affecting (openWorldHint=true), but the description adds no behavioral context beyond that. It doesn't disclose potential side effects such as evergreen auto-republishing or whether duplicates are created, which are relevant given idempotentHint=false.

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?

Two sentences, zero waste. The first sentence captures the core action and types, the second clarifies the alias relationship. It is perfectly front-loaded.

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 9 parameters, no output schema, and global side effects indicated by annotations, the description is too brief. It doesn't mention return values, side effects, or behavior when optional fields like evergreenEnabled are set. The description is minimally viable but leaves significant gaps.

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%, so parameters are already well-documented. The description doesn't add any param-specific meaning; it merely restates the type enum in prose. 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?

Description clearly states the verb 'Save' and the resource 'content to your library', and lists the content types (draft, template, evergreen) which map to the schema enum. It also notes it's an alias for save_to_library, distinguishing it from that sibling.

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 phrase 'for reuse' implies when to use the tool, but it doesn't provide explicit guidance on when to prefer this over sibling tools like save_project_content_to_library or update_library_item. The alias note is helpful but not a full usage guideline.

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