photos_update_album

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

The description adds that authentication is required and clarifies that it's a partial update allowing either field, beyond the destructiveHint=false annotation. It does not contradict any annotations, and the annotation is minimal, so the description adds meaningful behavioral context.

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?

Three sentences with no fluff. The purpose, constraints, and a usage hint are packed efficiently, front-loading the tool's primary function.

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 low complexity and full schema coverage, the description covers the purpose, required parameters, authentication, and how to obtain the cover photo. It lacks an explicit mention of return value, but that's not critical for an update 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?

The input schema already provides 100% coverage with clear descriptions for name, albumPath, and coverPhotoUid. The description adds no extra semantic detail beyond referring to these fields, so a baseline score of 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 renames an album or changes its cover photo, using specific verbs and a resource. It distinguishes from sibling tools like photos_create_album and photos_delete_album by specifying the exact mutation types.

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?

It explicitly notes the authentication requirement and the constraint that at least one of name or coverPhotoUid must be provided. It also directs users to photos_list_album_photos to discover nodeUid values, giving practical usage context, though it doesn't mention when not to use it.

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