sync_mylist

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

Annotations already flag this as destructive, non-readonly, non-idempotent, and open-world. The description adds the confirm=true approval gate, which is a valuable behavioral control beyond the annotations. However, it does not elaborate on side effects, reversibility, or the extent of modifications, so it only partially augments the annotation-provided safety profile.

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 two sentences, front-loaded with the primary action, and contains no filler. Every word contributes to understanding the tool's purpose and a key prerequisite.

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 complexity of the nested request schema and the lack of an output schema, the description is too terse. It does not mention potential failure modes, return behavior, or the practical effects of applying a diff (e.g., whether items not listed are removed). The workflow with diff_mylist is implied but not explicitly linked, leaving gaps for a mutation 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%, and the description only mentions the confirm parameter. The request object includes many fields (proposed_items, remove_unlisted, consolidate_duplicates, etc.) with no explanation of their meaning or relationship to the diff application. This is insufficient compensation for the low schema coverage.

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 uses a specific verb ('Apply') and resource ('MyList diff') that clearly identifies the tool's primary action. It also distinguishes itself from sibling tools like diff_mylist and other mylist functions by focusing on the application step rather than retrieval or creation.

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 explicitly states the precondition that the request must contain confirm=true, which indicates that this tool is for executing an approved diff and not for initial diff generation. This gives clear contextual guidance, though it does not explicitly name alternative tools or state when not to use this tool.

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